Thermochemistry Review

If the enthalpy ter (ΔH) is negative the reaction is ____.

• Endothermic

• Exothermic

• Neutral

If ΔH is positive, heat would be shown on the _____ side of the thermochemical equation.

• Reactant

• Product

Energy transfered between samples of matter because of a difference in their temperature.

• Temperature

• Enthalpy

• Entropy

• Heat

How much heat does an aluminum block absorb if 10.00 grams ae heated from 25.0^oC to 50.0^oC? the specific heat of aluminum is .900J/g^oC

• 450

• -450

• 225

• -225

C+ O₂ --> CO₂ + 60kJ, what is the value for ΔH for the reaction?

• +60

• -60

• there is no way to know

The diagram represents which type of reaction

• endothermic

• exothermic

Durning a phase change the temperature of a substance_________.

• always increases

• always decreases

• always stays the same

• varies

A 24.0 gram sample of copper was heated from 25.0^oC to 500.0^oC, 4378J of heat were absorbed, what is the specific heat of copper?

• .384

• 49909200

• 2.60

• 8.77

When you dropped a hot metal sample into room temperature water in the lab what happened?

• the heat from the metal traveled into the water

• the cool from the water traveled into the hot metal

• both of the other answers are correct

A measure of the average kinetic energy of a substance.

• heat

• temperature

• enthalpy

• entropy