Thermochemistry Review

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

• Endothermic
• Exothermic
• Neutral

Tags

NGSS.HS-PS1-4

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

• Reactant
• Product

Tags

NGSS.HS-PS1-4

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

• Temperature
• Enthalpy
• Entropy
• Heat

Tags

NGSS.HS-PS3-4

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

Tags

NGSS.HS-PS3-1

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

• +60
• -60
• there is no way to know

Tags

NGSS.HS-PS1-4

The diagram represents which type of reaction

• endothermic
• exothermic

Tags

NGSS.HS-PS1-4

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

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

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

Tags

NGSS.HS-PS3-4

A measure of the average kinetic energy of a substance.

• heat
• temperature
• enthalpy
• entropy

Tags

NGSS.HS-PS3-2