Hess' law

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6 Terms

1
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What is enthalpy?

The name given to the energy of a system

2
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What does enthalpy change depend on?

Pressure

Temperature

Amount of substance present

3
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What is enthalpy of formation?

Enthalpy change when one mole of compound is made from its elements under standard conditions, with all the reactants and products in their standard state

4
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What is the enthalpy change of combustion?

Enthalpy chnage when one mole of substance is completely burnt in oxygen, under standard conditions, with all the reactants and products in their standard state

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6
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What is Hess’ law?

If a reaction can occur by more than one route, the overall enthalpy change is independent of the route taken