AP Chemistry Thermochemistry Practice

Thermal energy always moves:

• From a high temperature object to a lower temperature object.

• From a lower temperature object to a higher temperature object.

• From an object with lower kinetic energy to an object with higher kinetic energy.

• From an object of higher mass to an object of lower mass.

Tags

NGSS.HS-PS3-4

The second  law of thermodynamics states that entropy of a system  tends to ______________. 

• increase

• decrease

• stay constant

• fluctuate wildly

Tags

NGSS.HS-PS3-4

The first law of thermodynamics states that energy is

• created

• destroyed

• conserved

• created and destroyed

Which law of thermodynamics states that absolute zero cannot be reached?

• 1st

• 2nd

• 3rd

Enthalpy is energy absorbed or relased during a chemical reaction as

• light.

• heat.

• sound.

• pressure.

Tags

NGSS.HS-PS1-4

What type of reaction is this?

• Endothermic

• Exothermic

• Allergic

Tags

NGSS.HS-PS1-4

What type of reaction is this?

• Endothermic

• Exothermic

• Allergic

Tags

NGSS.HS-PS1-4

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

Tags

NGSS.HS-PS3-1

4180 j of heat energy are added to change the temperature of water by 10*C. How many grams of water are being heated? c_water=4.18 j/g*C

• 4.18 j/g*C

• 10000g

• 174724g

• 100g

Tags

NGSS.HS-PS3-1

What heat energy is required to raise the temperature of a 1g sample of mercury (c_Hg=.16 j/g*C) by 100*C?

• 16j

• .0016j

• 16000j

• 625 j