Enthalpy Quiz

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What is enthalpy change of formation?
The enthalpy change of a compound when one mole of the compound, in its standard state, is formed from its constituent elements in their standard states.
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The difference in the heat contents of the products and the reactants is called...?
Heat of the reaction
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Under what set of standard conditions do standard enthalpies occur?
A stated temperature of 298 K (25°C), a pressure of 100 kPa (1 atmosphere) and a concentration of 1.0 mol dm−3 (for reactions with aqueous solutions).
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When 1.0 mole of ZnO(s) decomposes, the ΔH = 348 kJ/mol of heat energy. What does this tell you about the formation of ZnO(s)?
The formation of ZnO(s) is exothermic.
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What does Hess' Law state?
If a reaction can take place by more than one route and the initial and final conditions are the same, the total enthalpy change is the same for each route.
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Other cards in this set

Card 2

Front

The difference in the heat contents of the products and the reactants is called...?

Back

Heat of the reaction

Card 3

Front

Under what set of standard conditions do standard enthalpies occur?

Back

Preview of the front of card 3

Card 4

Front

When 1.0 mole of ZnO(s) decomposes, the ΔH = 348 kJ/mol of heat energy. What does this tell you about the formation of ZnO(s)?

Back

Preview of the front of card 4

Card 5

Front

What does Hess' Law state?

Back

Preview of the front of card 5

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