Heat is an example of which of the following which allows work to be done?

• energy

• heat changes

• specific heat

• thermochemistry

Tags

NGSS.HS-PS3-4

The reaction is best described as...

• Endothermic, since energy is absorbed

• Endothermic, since energy is released

• Exothermic, since energy is absorbed

• Exothermic, since energy is released

Tags

NGSS.HS-PS1-4

Ice cream melting is an example of an __________ process.

• endothermic

• exothermic

Tags

NGSS.MS-PS1-4

Which phrase best describes the reaction: N₂(g) + O₂(g)+ 182.6 kJ→2NO(g)

• Endothermic with ΔH= -182.6 kJ

• Endothermic with ΔH= +182.6 kJ

• Exothermic with ΔH= -182.6 kJ

• Exothermic with ΔH= +182.6 kJ

Tags

NGSS.MS-PS1-4

Sweating is an __________________ process because heat is released.

• endothermic

• exothermic

Tags

NGSS.HS-PS3-4

what does c stand for?

• heat change

• specific heat

• mass

• temperature

Mass must always be in ________ for energy calculations.

• Joules/gramsxC

• grams

• joules

• calories

Tags

NGSS.MS-PS3-4

If 400 grams of water at 70 degrees C loses 9750 J of heat, what is the final temperature of the water?

• 4.184 J/gC

• 5.8 C

• 76 C

• 64 C

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

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

• exothermic

• endothermic

Tags

NGSS.HS-PS3-4

What device is used to measure the amount of heat involved in a chemical reaction or physical process?

• barometer

• calorimeter

• thermometer

Tags

NGSS.HS-PS3-4