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4. From the following data: a) C (graphite) +O2(g)CO2(g)Hrxno=393.5kJ/mol [4] b) H2(g)+1/2O2(g)H2O( I )Hrxn0=258.8kJ/mol c) 2C4H10(g)+13O2(g)8CO2(g)+10H2O(I)Hrxno=3340kJ/mol Calculate the enthalpy change for the reaction: 4C (graphite)

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4. From the following data: a) C (graphite) +O2(g)CO2(g)Hrxno=393.5kJ/mol [4] b) H2(g)+1/2O2(g)H2O( I )Hrxn0=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)

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