Question: 4. From the following data: [4] a) C (graphite) +O2(g)CO2 (g) Hrxno=393.5kJ/mol b) H2(g)+1/2O2(g)H2O(l)Hrxno=258.8kJ/mol c) 2C4H10(g)+13O2(g)8CO2(g)+10H2O(I)Hrxno=3340kJ/mol Calculate the enthalpy change for the reaction: 4C (graphite)

4. From the following data: [4] a) C (graphite) +O2(g)CO2 (g) Hrxno=393.5kJ/mol b) H2(g)+1/2O2(g)H2O(l)Hrxno=258.8kJ/mol c) 2C4H10(g)+13O2(g)8CO2(g)+10H2O(I)Hrxno=3340kJ/mol Calculate the enthalpy change for the reaction: 4C (graphite) +5H2(g)C4H10(g) 5. Determine the amount of heat (in kJ ) given off when 3.31102gNO2 are produced according to the equation: 2NO(g)+O2(g)2NO2(g)H=114.6kJ/mol

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