AP Chemistry Thermochemistry Practice

When thermal energy is added to a substance, the substance's particles move:

• More rapidly at an increased diestance from each other.

• More rapidly with less distance between each other.

• More slowly with a greater distance between each other.

• More slowly with a reduced distance between each other.

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-4

The temperature of a glass of cold water will eventually...

• Match the temperature of the surrounding environment.

• Always be colder than the surrounding environment.

• Become warmer than the surrounding environment.

• Never change temperature.

Tags

NGSS.HS-PS3-4

H₂ + 2 C + N₂ + 270.3 kJ --> 2 HCN
Is this reaction endothermic or exothermic?

• Endothermic 

• Exothermic

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

A chemical reaction that absorbs heat from the surroundings is said to be __________ and has a __________ ΔH at constant pressure.

• endothermic; positive

• endothermic; negative

• exothermic; negative

• exothermic; positive

Tags

NGSS.HS-PS1-4

What kind of graph is this?

• endothermic

• exothermic

Tags

NGSS.HS-PS1-4

Heat flows from _______ to _______ objects

• cooler to warmer

• warmer to warmer

• warmer to cooler

• cooler to cooler

Tags

NGSS.HS-PS3-4

Heat is measured in 

• joules

• grams

• degrees celcius

Tags

NGSS.MS-PS3-3

Energy can not be created or destroyed, it can only be transferred refers to the....

• law of conservation of energy

• law of conservation of mass

• life facts

• law of conservation of chemistry

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-4

A slower particle has a lower energy than an identical, faster particle.

• True

• False

The transfer of thermal energy between objects of different temperatures is called...

• temperature

• heat

• internal energy

• none of these

Tags

NGSS.HS-PS3-4