Thermochemistry Review

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

• Reactant
• Product

H₂ + ½ O₂ --> H₂O + 285kJ is an example of a(n)

• Electrical equation
• Heat equation
• Thermochemical equation

Tags

NGSS.HS-PS1-4

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

• Endothermic
• Exothermic
• Neutral

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 can you convert Kelvin to Celcius?

• add 273
• subtract 273
• multiply by 273
• divide by 273

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

Tags

NGSS.MS-PS1-4

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