HC Unit 6 Ions Test

Match the description with the correct term.

• a process that absorbs energy

• exothermic

• a process that releases energy

• specific heat capacity

• energy needed to raise temperature of 1 g of water 1 °C

• calorie

• energy needed to raise temperature of 1 g of a substance 1 °C

• endothermic

Tags

NGSS.HS-PS3-2

Match the description with the correct term.

• system

• flow of energy due to temperature differences

• heat

• ability to do work or produce heat

• energy

• a measure of the dispersal of energy through a system

• entropy

• portion of the universe in which you are interested

Tags

NGSS.HS-PS3-4

Match the description with the correct term.

• energy of motion

• temperature

• force acting over a distance

• potential energy

• measure of the random motions of

  molecule

• kinetic energy

• stored energy

• work

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-3

NGSS.HS-PS3-4

​ (a)   ​ (b)   of heat must be added to 5.0 x 10² g of liquid water to raise its temperature from 25 °C to 55 °C.

• 15
• 30
• 63000
• calories
• joules
• 150
• 630

Tags

NGSS.HS-PS3-4

The amount of heat gained or lost by a substance depends on all of the following EXCEPT (a)  

• the change in temperature
• the change in volume
• the mass
• the specific heat capacity

Tags

NGSS.HS-PS3-4

(a)   has the greatest entropy.

• 100 g of ice at 0 °C
• 100 g of water at 25 °C
• 100 g of water at 50 °C
• 100 g of steam at 100 °C

One (a)   of water requires 4.184 J of heat to cause a change in temperature of 1 °C.

• molecule

• gram

• mole

• kilogram

A negative sign for the change in enthalpy for a reaction indicates that the reaction is (a)   .

• fast
• slow
• exothermic
• endothermic

Tags

NGSS.HS-PS1-4

What is the enthalpy change if 25.00 g of the compound is burned in excess O₂?

(include a + or - sign on your answer)

​ (a)   (b)   ​ (c)  

• 566.9
• 1134
• 2906
• 36340
• kJ
• J
• cal
• +
• -

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

Consider the equation PCl₅(g) → PCl₃(g) + Cl₂(g). Which of the following is true?

(a)  

• Energy is released, and a bond is formed.

• Energy is absorbed, and a bond is formed.

• Energy is released, and a bond is broken.

• Energy is absorbed, and a bond is broken.

Tags

NGSS.HS-PS1-4