Free Printable Honors Chem Unit 1

1.

Which of the following forms of energy is potential

a)

gravitational

b)

sound

c)

eletrical

d)

thermal

2.

Which form of energy is stored in the fuel used inside of an airplane?

a)

mechanical

b)

thermal

c)

chemical

d)

gravitational

3.

I hold up a water balloon up high before dropping it and watching it fall. This is an example of which forms of energy transformation?

a)

chemical -> gravitational

b)

motion -> elastic

c)

chemical -> motion

d)

gravitational -> motion

4.

Which of the following best shows chemical energy being transformed

a)

jumping out of an airplane

b)

melting snow

c)

digesting food

d)

melting snow

5.

Which of the following show an energy transformation going from one form of kinetic energy to another form of kinetic energy

a)

The river dam uses the water passing through to create electrical energy

b)

The energy from the cell phone battery is used to turn on the screen

c)

An apple falls out of a tree onto the floor

d)

Sunlight gives the plant energy to create sugar

6.

Which of the following pictured best represents the transfer of energy in the following example?

a)

A

b)

B

c)

C

d)

D

7.

Which of the following are forms of energy relevant to the "eye of fire" phenomenon? Choose all that apply.

a)

Radiant Energy

b)

Chemical Energy

c)

Nuclear Energy

d)

Thermal Energy

e)

Gravitational Energy

8.

What type of energy is NOT described correctly

a)

Electrical energy is stored potential energy relating to electrons

b)

Radiant energy is used kinetic energy in the form of moving waves

c)

Thermal energy is used kinetic energy relating to molecules moving

d)

Elastic energy is stored potential energy relating to tension in materials

9.

A student explains that an example of an energy transformation in the eye of fire phenomenon involves the radiant energy of the fire leading to the gravitational energy of the helicopters that swirl around. Which of the following responses is a better example of an energy transformation?

a)

The thermal energy of the fire causes a phase change in the ocean, vaporizing liquid water into gas.

b)

The radiant energy of the fire leads to the emergency helicopters taking flight (gravitational energy) and coming to the scene to put it out.

c)

The radiant of the energy of the fire is caused by the chemical potential energy of the gasoline releasing all of its energy through combustion.

d)

The radiant energy of the fire is unrelated to the gravitational energy of the helicopter and cannot transform into that form of energy in this situation

10.

Select which of the following measurements does NOT need to be completed to determine the amount of heat per gram released from an item in a calorimetry lab (choose the measurement that is not needed)

a)

Final Temperature of the water

b)

Temperature of the metal can

c)

Initial temperature of the water

d)

Final mass of item

e)

Amount of water in the can

11.

If I use a greater amount of water in this experiment, which of the following are ture

a)

The same amount of heat will be transferred to the water

b)

The water will have a less of a change in temperature

c)

The final result of the experiment will be the same

d)

All of the Above

12.

In an experiment where students burned a bunch of their favorite snack items, Jessica found that the average temperature change for Doritos was 6.0 °C while Lay's had a change of 11.0 °C. Which snack can Jessica conclude had the greater number of calories?

a)

Lay's

b)

Dorito's

c)

Not enough information to know

d)

They have the same number of calories

13.

The following data was gathered from a calorimetry lab. Each was completed using the same calorimeter with the same mass of water. Which substance would you argue contained the most chemical potential energy based on the data?

a)

Ethanol

b)

Butane

c)

Propane

14.

What would be the best way to improve the accuracy of this lab?

a)

Add more water so it is easier to measure with a thermometer

b)

Find a way to fully surround the burning sample with water so all the heat goes into the water

c)

Make sure the sample or candle burns all the way so we release all its potential energy

d)

Start with colder water so we can see more temperature change

15.

A student accidentally measure the mass of both of the can and the water rather than just the water. If the student does not notice this mistake, how will their calculation of heat transferred be affected?

a)

Their heat calculated will be too low because the mass they used in their equation is too high

b)

Their heat calculated will not be affected

c)

Their heat calculated will be too high because the mass they used in their equation is too high

16.

____________ is a form of energy that flows from a warmer object to a cooler object, while __________ is a measure of the average kinetic energy of the particles in a sample of matter

(a)

17.

The chemical bonds in the (a) are broken due to a combustion reaction.

18.

The chemical energy _____________ into thermal energy and _____________ to the water

(a)

19.

The water changes temperature, which we measure by _______________. The larger the change in temperature, the _______________ chemical energy was burned.

(a)

20.

The larger the specific heat of the substance, the:

a)

better that substance is at resisting changes in temperature

b)

the specific heat does not affect a substances change in temperature

c)

the hotter that substance will get

d)

worse that substance is at resisting changes in temperature

21.

Which of the substances would heat up the fastest

a)

Plastic

b)

Copper

c)

Granite

d)

Gold

22.

Consider the following specific heats of metals. If the same amount of heat is added to 25.0 g of each of the metals, which are all at the same initial temperature, which metal will have the lowest temperature

a)

magnesium

b)

silver

c)

lead

d)

iron

e)

zinc

23.

The specific heat of silver is 0.24 J/g°C. How many joules of energy are needed to warm 4.37g of silver from 25.0°C to 27.5°C

(a)

24.

What is the specific heat of a substance if 1560 J are required to raise the temperature of a 312g sample by 15°C

(a)

25.

Due to a broken pipe, natural gas leaked into the ocean and burned, warming up the surrounding 7,500,000,000g of water. The temperature of the ocean is typically 20.3°C, but scientists measured the temperature to be 87.3°C after the natural gas had burned. What variable would you be asked to solve for based on this information?

a)

m

b)

q

c)

c

d)

change in temperature

26.

Due to a broken pipe, natural gas leaked into the ocean and burned, warming up the surrounding 7,500,000,000g of water. The temperature of the ocean is typically 20.3°C, but scientists measured the temperature to be 87.3°C after the natural gas had burned. What variable would you be asked to solve for based on this information?

(a)

27.

So far we have considered pure water in our equation. However, the ocean being heated is composed of saltwater. When salt is dissolved in water, it disrupts the attractions between water and molecules, making it easier for the water to heat up. How would each of the variables in q=mcΔT be affected from this previous problem.

The variable q is:

a)

Increased

b)

Decreased

c)

Stays the same

28.

So far we have considered pure water in our equation. However, the ocean being heated is composed of saltwater. When salt is dissolved in water, it disrupts the attractions between water and molecules, making it easier for the water to heat up. How would each of the variables in q=mcΔT be affected from this previous problem.

The variable c is:

a)

Increased

b)

Decreased

29.

So far we have considered pure water in our equation. However, the ocean being heated is composed of saltwater. When salt is dissolved in water, it disrupts the attractions between water and molecules, making it easier for the water to heat up. How would each of the variables in q=mcΔT be affected from this previous problem.

The variable m is:

a)

Increased

b)

Decreased

c)

Stays the Same

30.

So far we have considered pure water in our equation. However, the ocean being heated is composed of saltwater. When salt is dissolved in water, it disrupts the attractions between water and molecules, making it easier for the water to heat up. How would each of the variables in q=mcΔT be affected from this previous problem.

The variable t is:

a)

Increased

b)

Decreased

31.

The fire was extinguished using nitrogen, which pushes away oxygen in the air so it can no longer fuel the fire. After the fire is put out, the water below the fire is very warm compared to the rest of the ocean.

If we assume the warmer water heated the surrounding 66,000,000,000 g of water, what will be the final temperature of the ocean in this area? Use the information in the model below to help your calculation. The specific heat of water is 4.18 J/g°C.

(a)

32.

The following statements describe energy movement in the ocean on fire phenomenon. Choose the statement that correctly labels the movement with endothermic or exothermic.

a)

Look at the fire, it released heat and was exothermic

b)

Looking at the water, it released heat and was exothermic

c)

Looking at the fire, it absorbed heat and was endothermic

d)

Looking at the water, it absorbed heat and was exothermic

33.

A student claims the cold ocean water transferred its cold energy to the warmer water near the fire. Which of the following best explains why the student’s claim is incorrect?

a)

The student described an endothermic process when they should have described an exothermic process

b)

They should have described an energy transformation instead of an energy transfer

c)

They should have talked about the cold particles, not just the cold energy

d)

They should have described heat energy moving away from the fire, not cold energy going toward the fire

34.

Suppose the fire released 3,500,000 J of heat. What mass of water could this much energy boil completely?

ΔHfus = 334 J/g = 79.7 cal/g

ΔHvap = 2260 J/g = 533 cal/g

Report your answer with proper significant figures.

(a)

35.

What is it called when a solid turns directly into a gas?

a)

Vaporizing

b)

Sublimation

c)

Melting

d)

Desposition

36.

A hot object at 100 degrees Celsius (bottom) and a cold object at 10 degrees Celsius (top) are placed on top of each other. Which of the following best predicts how energy will transfer between the two objects?

a)

Energy will not transfer and the hot object will remain hot and the cold object will remain cold.

b)

Energy will transfer from the cold object to the hot object.

c)

Energy will transfer from the hot object to the cold object.

37.

If I hold an ice cube and my hand is the system, is the process endothermic or exothermic?

a)

Exothermic

b)

Endothermic

38.

Which of the following models demonstrates the correct transfer of energy between the ice cubes and the water?

a)

A

b)

B

c)

C

d)

D

39.

A student claims the cold ice cube transferred its cold energy to the warmer water around it. Which of the following best explains why the student’s claim is incorrect?

a)

They should have described heat energy moving away from the fire, not cold energy going toward the fire

b)

The student described an endothermic process when they should have described an exothermic process

c)

They should have described an energy transformation instead of an energy transfer

d)

They should have talked about the cold particles, not just the cold energy

40.

Which regions on the phase change graph below are considered exothermic processes?

a)

C -> D

b)

A -> B

c)

E -> D

d)

E -> F

41.

Suppose the fire released 3,500,000 J of heat. What mass of water could this much energy boil completely?

ΔHfus = 334 J/g = 79.7 cal/g

ΔHvap = 2260 J/g = 533 cal/g

Report your answer to the nearest whole number.

(a)

Honors Chem Unit 1

Total questions: 41

Worksheet time: 6hrs 23mins

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