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Chemistry

Enthalpy Changes (Section 5)

QuestionAnswer
What is the enthalpy change of a reaction? The overall change in energy in a reaction
What are the units for enthalpy change? kJ/mol
If a reaction is exothermic, what value does the enthalpy change have? Negative
If a reaction is endothermic, what value does the enthalpy change have? Positive
What is the equation to calculate heat energy transferred? Heat energy transferred = mass of liquid x specific heat capacity x change in temperature (Q = m x c x △T)
What is the specific heat capacity of water? 4.2J/g/ºC
What is specific heat capacity? The amount of energy needed to raise 1 gram of a substance by 1ºC
What is the symbol for molar enthalpy change? △H
Created by: JoeMather
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