Final Review Thermochemistry

Match the following

• Energy is exiting the system, feels hot

• Exothermic

• Energy is absorbed by system; feels cold

• Equilibrium

• Warmer and cooler temperatures balance out to be the same temperature

• Endothermic

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS1-2

Convert 42 kJ into joules

• 0.042 J

• 175.73 J

• 42000 J

• 10.04 J

Tags

NGSS.HS-PS3-1

Consider the reaction: 2 H₂O + energy --> 2H₂ + O₂

• Synthesis; exothermic because releasing energy

• Synthesis; exothermic because absorbing energy

• Decomposition; endothermic because absorbing energy

• Decomposition; endothermic because releasing energy

Tags

NGSS.HS-PS1-4

A 500 g piece of aluminum increases in temperature by 7°C. What is the heat energy produced? Specific heat of Aluminum is 0.900 J/gºC.

• 3000 J

• 3000 g

• 3150 J

• 3150 g

Tags

NGSS.HS-PS3-4

If 238 J of heat is absorbed by a sample of metal with a mass of 40.7 g, and it raises the temperature from 20.0°C to 32.4°C, what is the specific heat capacity of the metal?

• 2.34 J/g°C

• 0.472 J/g°C

• 6.13 J/g°C

• 0.163 J/g°C

Tags

NGSS.MS-PS3-4

What formula is used to find the heat needed to make an object condense?

• -10,020 J

• -0.089 J

• -67,800 J

• -94.2 J

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

• 169,500 J

• 25,050 J

• 313.5 J

• 0.033 J

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The diagram shows a heating curve for ice. Which line represents the ice melting?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-4

Durning a phase change the temperature of a substance_________.

• always increases
• always decreases
• always stays the same
• varies

Tags

NGSS.MS-PS1-4