Thermochemistry Review

What type of heat transfer is a beaker on a hot plant an example of?

• Conduction
• Covection
• Radiation
• Chemical

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

• Endothermic

• Exothermic

• Neutral

Tags

NGSS.HS-PS1-4

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

• Electrical equation
• Heat equation
• Thermochemical equation

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

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

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