A piece of copper alloy with a mass of 85.0 g if heated from 30.0°C to 45°C. In the process, it absorbs 523 J of energy as heat. What is the specific heat of the copper?

• 0.41 J/g°C

• 0.73 J/g°C

• 0.29 J/g°C

• 0.57 J/g°C

If an 85.0 g sample of copper with a specific heat of 0.41 J/g°C is cooled from 45°C to 25°C, how much energy will it lose?

• -497 J

• -846 J

• -697 J

• -346 J

Tags

NGSS.HS-PS3-4

What is meant by enthalpy change?

• Change in light energy

• Change in kinetic energy

• Change in potential energy

• Change in heat energy

Tags

NGSS.HS-PS1-4

How much energy would be absorbed as heat by 75 g of iron (specific heat 0.449 J/g·K) when heated from 295 K to 301 K?

• 202 J

• 157 J

• 285 J

• 379 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

Two metals of equal mass but different specific heats absorb the same amount of heat. Which metal undergoes the smaller change in temperature?

• the metal with the higher specific heat

• the metal with the lower specific heat

• both undergo the same change in temperature

• cannot determine from the information given

Increasing the temperature of a substance

• increases its specific heat.

• increases the potential energy.

• increases the kinetic energy.

• makes the molecules move more slowly.

Tags

NGSS.HS-PS3-2

You need 70.2 J to raise the temperature of an unknown mass of ammonia, NH₃(g), from 23.0°C to 24.0°C. If the specific heat of ammonia is 2.09 J/g°C, calculate the unknown mass of ammonia.

• 147 g

• 6896 g

• 0.715 g

• 33.6 g

What is the symbol for Thermal Energy?

• Q
• T
• m
• Cp

Tags

NGSS.HS-PS3-4

What unit do you use to measure Thermal Energy?

• J/Kg ºC
• Kg
• ºC
• J

Tags

NGSS.MS-PS3-4

The symbol for specific heat is .......

• Cp
• Q
• m
• T