AP Chemistry - Thermochemistry Exam - Unit 6

For an endothermic reaction, the heat or energy is given on the ____ side or is written beside the equation as a ____ number

• reactant; positive

• product; positive

• reactant; postive

• product; negative

For an exothermic reaction, the heat or energy given on the ____ side or is written beside the equation as a ____ number

• reactant; positive

• product; positive

• reactant; negative

• product; negative

Tags

NGSS.HS-PS3-1

The specific heat of aluminum is 0.21 J/g°C.  How much heat(Q) is released when a 10 g piece of aluminum foil is taken out of the oven and cools from 100° to 50°?

• 105 J
• 10.5 J
• 1.05 J
• 0.105 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

Calculate A 50g sample is heated with 500 joules of energy and has a 10*C temperature change. Calculate it’s specific heat.

• 1 j/g*C

• 250000 j/g*C

• 500 j/g*C

• 10 j/g*C

When two samples of similar mass are subjected to the same heat energy, the sample with the SMALLER specific heat will have a _________ temperature change.

• SMALLER

• LARGER

• EQUAL

___________________ is the capacity to do work or supply heat.

• energy

• heat changes

• specific heat

• thermochemistry

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

• exothermic

• endothermic

Tags

NGSS.HS-PS3-4

Heat flows from _______ to _________.

• warm to cool

• cool to warm

Tags

NGSS.HS-PS3-4

What is the SI unit of heat and energy?

• calorie

• celsius

• joule

Tags

NGSS.HS-PS3-4

The law of conservation of energy states that

• in any chemical or physical change, energy cannot be created or destroyed, only changed in form.

• heat changes occur during chemical and physical changes.

• energy is the capacity to do work or to supply heat

• there are two types of energy, kinetic and potential

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4