THERMOCHEMISTRY

The higher the temperature, the --

• more energy is absorbed as heat.

• more energy is given off as heat.

• less kinetic energy there is in a sample of matter.

• more kinetic energy there is in a sample of matter.

The average kinetic energy of the particles in a sample of matter is measured as the --

• kinetic force

• thermal rate

• reaction rate

• temperature

Which of the following would be used to determine the states of a substance at a given temperature and pressure?

• phase diagram

• crystalline structure

• le chatelier chart

• heat diagram

Based on the diagram above, what happens to room temperature water at 1 atm when it reaches O^oC?

• it boils

• it freezes

• it exists as all three states

• it reaches the critical point

Photosynthesis is an endothermic reaction. Which best describes the flow of energy?

• energy is absorbed

• energy is given off

• energy is created

• energy is destroyed

Which of the following equations shows an exothermic reaction?

• CH₄ + 2O₂ → CO₂ + 2H₂O

• CH₄ + 2O₂ + heat → CO₂ + 2H₂O

• CH₄ + 2O₂ → heat → CO₂ + 2H₂O

• CH₄ + 2O₂ → CO₂ + 2H₂O + heat

Which of the following is used to express the measurement of specific heat capacity?

• J/g^oC

• J/g^oF

• cal/g^oF

• g^oC/J

The heat required to raise the temperature of 1g of a substance by 1^oC is the --

• heat of fusion

• specific heat capacity

• heat of formation

• heat of vaporization

ΔH = -92.2 J

Based on the information above, energy from the reaction is --

• absorbed

• created

• destroyed

• released

ΔEuniverse=ΔEsurroundings + ΔEsystem = 0

The expression above is a representation of the law of --

• conservation of energy

• conservation of mass

• definite composition

• multiple proportions