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| Question | Answer |
| What does Hess's Law state? | Hess's law states that the total enthalpy change of a reaction is always the same, no matter which route is taken |
| TRUE OR FALSE: The enthalpy change of formation for all elements is zero | TRUE The element's being formed from that element, so there's no change in enthalpy |
| Describe the Hess cycle used to calculate the enthalpy change of reaction for the reaction below, given the enthalpies of formation SO₂ + 2H₂S --> 3S + 2H₂O |
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| Describe the Hess cycle used to calculate the enthalpy change of formation for ethanol, given the enthalpies of combustion |
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Using this Hess diagram, describe the calculations needed to calculate the enthalpy change of reaction for the following reaction
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Using Hess's Law, route 1 = route 2 ΔᵣH = -(ΔH₁) + (ΔH₂) + (ΔH₃) |
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