Energy changes
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How do you find the heat change (in kJ) for the following reaction:
2HCl(g) + PbO2(s)---->PbCl2(s) + H2O2(l)
Corrie writes....
If you have the necessary heat (enthalpy) of formation data, then the method is:
1. Add up the heats of formation of all the products, taking care to multiply by the number of moles of each appearing in the equation, for example x2 for HCl.
2. Do the same for the reactants.
3. Subtract 2. from 1.
Your answer should be -ve, between -200 and -300 kJ according to my calculations.
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updated: 14 August 2008
