Question

Given these reactions, X(s) + +0,8) — XO(S) XCO,(s) — XO(s) + CO2(9 what is AH for this reaction? AH = -656.1 kJ/mol AH = +351.7 kJ/mol X(s) +0,() + CO2(g) — XCO,() AHL kJ/mol

Answer 1

Given reactions are as follows: X(s) O2(g) XO(s) (1) XCO, (s)XO(s) CO2 (g) (2) To get the required reaction subtract reaction (2) from reaction (1) as follows: O2(g) - XCO, (s)» XO(s) -XO(s) -CO,(g) X(s) O2(g)CO2 (g) >XCO3(s) X(s) AH 656.1-351.7 Therefore AH 1007.8kJ/mol Hence, AH for the required reaction is -1007.8 kJ/mol

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