AP Chemistry Thermochemistry Bond Enthalpies

The heat content of a system at constant pressure is called

• entropy
• enthalpy
• heat
• energy

The capacity to do work or transfer heat

• temperature
• energy
• power
• enthalpy

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The heat required to raise the temperature of WATER 1∘C

• calorie
• joule
• specific heat
• energy

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Formula for solving specific heat problems

• q = mcΔT
• H = ΔH x moles
• H = ΔH x grams
• products - reactants

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The following graph shows a(n)

• endothermic reaction
• exothermic reaction
• increase in entropy
• decrease in entropy

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An endothermic reaction feels _____ to the touch

• warm
• cool

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What type of reaction is shown?

• reactants
• endothermic
• exothermic
• products

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In an exothermic process the surrounding looses heat. 

• True
• False

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NGSS.HS-PS1-4

H₂ + 2 C + N₂ + 270.3 kJ --> 2 HCN
Is this reaction endothermic or exothermic?

• Endothermic 
• Exothermic

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NGSS.HS-PS1-4

Is the combustion of gasoline endothermic or exothermic?

• Endothermic
• Exothermic

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