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Thermochemistry Quiz 2023

Total questions: 60

Worksheet time: 1hrs 2mins

Name
Class
Date
1.

Point A refers to

a)

Freezing Point

b)

Boiling Point

2.

Point B refers to

a)

Freezing Point

b)

Boiling Point

3.

Phase during point C is

a)

solid

b)

liquid

c)

gas

d)

solid + liquid

e)

liquid + gas

4.

Phase during point D is

a)

solid

b)

liquid

c)

gas

d)

solid + liquid

e)

liquid + gas

5.

Phase during point E is

a)

solid

b)

liquid

c)

gas

d)

solid + liquid

e)

liquid + gas

6.

Phase during point F is

a)

solid

b)

liquid

c)

gas

d)

solid + liquid

e)

liquid + gas

7.

What tool can you use to measure the average kinetic energy of a sample?

a)

A Balance

b)

A Bunsen Burner

c)

A Thermometer

d)

A Graduated Cylinder

8.

In an exothermic reaction, energy is being ________________.

a)

absorbed

b)

released

9.

Reactions where the energy of the reactants is greater than the energy of the products are called _____________.

a)

Endothermic

b)

Exothermic

10.
Heat is measured in 
a)
joules
b)
grams
c)
degrees celcius
11.

Energy can not be created or destroyed, it can only be transferred refers to the ______________. This is also known as the First Law of Thermodynamics.

a)

law of conservation of energy

b)

law of conservation of mass

c)

life facts

d)

law of conservation of chemistry

12.

Melting, boiling, evaporation, sublimation and cooking are:

a)

a) EXO

b)

b) ENDO

13.
Endothermic reactions feel
a)
warm
b)
cold
14.

What type of reaction occurs in a hand warmer?

a)

exothermic

b)

endothermic

15.

What term is given to a reaction which transfers heat energy to the surroundings?

a)

Endothermic

b)

Reversible

c)

Exothermic

d)

Explosion

16.

An instant icepack is an example of what type of reaction?

a)

Endothermic

b)

Exothermic

c)

Acid base

d)

Neutralisation

17.

In which region(s) does temperature increase?

a)

Region C only

b)

Regions B and D

c)

Regions A, C, and E

d)

Regions A and B

18.
A measure of the average kinetic energy of a substance.
a)
heat
b)
temperature
c)
enthalpy
d)
entropy
19.

Between which points is the temperature of the substance remaining constant?

a)

A-B only

b)

A-B, C-D, and E-F

c)

B-C only

d)

B-C and D-E

20.

The melting point of the sample is

a)

-60 ºC

b)

20 ºC

c)

60 ºC

d)

100 ºC

21.

NaCl was heated starting at an initial temperature of 0°C. The heating curve is shown in the picture. What is the melting point of this substance?

a)

0°C

b)

801°C

c)

1000°C

d)

1465°C

22.

How many states of matter are present during line segment BC?

a)

One

b)

Two

c)

Three

d)

Depends on the temperature

23.

In which region(s) of the heating curve would water be a liquid and a gas at the same time?

a)

A

b)

B

c)

C

d)

D

e)

E

24.

The diagram represents two solids and the temperature of each. What occurs when the two solids are placed in contact with each other?

a)

Heat energy flows from solid A to solid B. Solid A decreases in temperature

b)

Heat energy flows from solid A to solid B. Solid A increases in temperature

c)

Heat energy flows from solid B to solid A. Solid B decreases in temperature.

d)

Heat energy flows from solid B to solid A. Solid B increases in temperature.

25.

If the temperature of a sample is decreased, the particles

a)

slow down

b)

have a lower kinetic energy

c)

speed up

d)

slow down and have a lower kinetic energy

26.

A reaction that releases heat is

a)

endothermic

b)

exothermic

c)

exotic

d)

a combustion reaction

27.
Which of the letters (A-D) represents activation energy?
a)
A
b)
B
c)
C
d)
D
28.
What kind of graph is this?
a)
endothermic
b)
exothermic
c)
both
d)
neither
29.
What kind of reaction is this?
a)

endothermic

b)
exothermic
30.

SI unit of energy

a)

Calorimeter

b)

Calorie

c)

Joule

d)

Enthalpy

e)

Specific heat

31.

Device used to measure the heat absorbed or released during a chemical or physical process

a)

Calorimeter

b)

Calorie

c)

Joule

d)

Enthalpy

e)

Specific heat

32.
Energy can not be created or destroyed, it can only be transferred refers to the....
a)
law of conservation of energy
b)
law of conservation of mass
c)
life facts
d)
law of conservation of chemistry
33.
Heat flows from _______ to ______ objects
a)
cooler to warmer
b)
warmer to warmer
c)
warmer to cooler
d)
cooler to cooler
34.
Heat travels from the sun to the earth by the process of...
a)
conduction
b)
convection
c)
radiation
d)
insulation
35.
Heat is measured in 
a)
joules
b)
grams
c)
degrees celcius
36.

From point A to point F, the sample is going through an __________ process by __________.

a)

exothermic, releasing heat to the surroundings

b)

exothermic, absorbing heat from the surroundings

c)

endothermic, releasing heat to the surroundings

d)

endothermic, absorbing heat from the surroundings

37.

What is the freezing point of the substance?

a)

0oC

b)

60oC

c)

120oC

d)

180oC

38.
In which region(s) does temperature remain constant?
a)
Region 1, 3, & 5
b)
Region 2 & 4
c)
Region 1 only
d)
Region 1 & 2
39.

Given the heating curve of a solid being heated at a constant rate, what is the boiling point of this substance?

a)

20°C

b)

50°C

c)

110°C

d)

170°C

40.
What type of reaction is this?
a)
Endothermic
b)
Exothermic
41.

When heat flows from system to the surroundings that is an example of an ________________ process.

a)

exothermic

b)

endothermic

42.

Kinetic energy is energy gained _______________

a)

while at rest

b)

during motion

43.

What area of study in chemistry is concerned with the heat transfers that occur during chemical reactions?

a)

stoichiometry

b)

thermochemistry

c)

inorganic chemistry

d)

physical chemistry

44.

The graph is showing an ____________ reaction.

a)

exothermic

b)

endothermic

45.

The graph is showing an _________ reaction

a)

endothermic

b)

exothermic

46.

___________________ is the capacity to do work or supply heat.

a)

energy

b)

heat changes

c)

specific heat

d)

thermochemistry

47.
What does temperature measure?
a)
Heat
b)
ºC
c)
Kinetic Energy
d)
Thermal Energy
48.
The transfer of thermal energy between objects of different temperatures is called...
a)
temperature
b)
heat
c)
internal energy
d)
none of these
49.
Heat is measured in 
a)
joules
b)
grams
c)
degrees celcius
50.
Durning a phase change the temperature of a substance_________.
a)
always increases
b)
always decreases
c)
always stays the same
d)
varies
51.

Point B refers to

a)

Freezing Point

b)

Boiling Point

52.

Point A refers to

a)

Freezing Point

b)

Boiling Point

53.

Phase during point C is

a)

solid

b)

liquid

c)

gas

d)

solid + liquid

e)

liquid + gas

54.

Phase during point D is

a)

solid

b)

liquid

c)

gas

d)

solid + liquid

e)

liquid + gas

55.

Phase during point E is

a)

solid

b)

liquid

c)

gas

d)

solid + liquid

e)

liquid + gas

56.

Phase during point F is

a)

solid

b)

liquid

c)

gas

d)

solid + liquid

e)

liquid + gas

57.

When a substance is changing from liquid to a gas, what do you have to do to change, and what is the process called?

a)

Add heat

b)

Remove heat

c)

Condensation

d)

Vaporization

58.

When a substance is changing from liquid to solid, what do you have to do to change, and what is the process called?

a)

Add heat

b)

Remove heat

c)

Melting

d)

Freezing

59.

When a substance is changing from gas to liquid, what do you have to do to change, and what is the process called?

a)

Add heat

b)

Remove heat

c)

Condensation

d)

Vaporization

60.

When a substance is changing from solid to liquid, what do you have to do to change, and what is the process called?

a)

Add heat

b)

Remove heat

c)

Melting

d)

Freezing

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