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Have to write the equation for question 3 and 4
Adrian Dingles Chemistry Pages and ChemEducator LLC 2013 All rights rese 3 The standard enthalpy of combustion of H%) The standard enthalpy of combustion of (s) Hesss Law Hesss Law states that, the enthalpy change during a depends only on the na reaction reactants and products and is independent of the route taken. Task 5Civ Using one of the following methods to calculate the enthalpy changes questions
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Answer #1

Q1.

STD enthalpy for combustion of H2(G)

so

H2(g) + O2(g) = H2O(g)

balance

H2(g) + 1/2O2(g) = H2O(g)

Hcomb = Hprod - Hreact = H2O - (H2 + 1/2O2)

Q4.

Combusiton of Al(s)

Al(s) + O2(g) = Al2O3(s)

balance

2Al(s) + 3/2O2(g) = Al2O3(s)

Hcomb = Al2O3 - (2*Al + 3/2*O2)

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