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Chemistry
Enthalpy Changes (Section 5)
Question | Answer |
---|---|
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 |