a.) Using standard enthalpies of formation, calculateH o for the following react

Question

a.) Using standard enthalpies of formation, calculateHo for the following reaction:
2 C6H6(l)+15 O2(g)-> 12CO2(g)+6 H20(g) b.) How many grams of C6H6(P) must becombusted in the above reaction to produce 2570 kJ of heatenergy? a.) Using standard enthalpies of formation, calculateHo for the following reaction:
2 C6H6(l)+15 O2(g)-> 12CO2(g)+6 H20(g) b.) How many grams of C6H6(P) must becombusted in the above reaction to produce 2570 kJ of heatenergy? b.) How many grams of C6H6(P) must becombusted in the above reaction to produce 2570 kJ of heatenergy?

Explanation / Answer

For the given reation.                             C6H6(l)+15 O2(g) -----> 12 CO2(g)+6H2O(g) From the standered values                             Hrxn =Hoproducts-  Horeactants.                                        = [12(-393.5kJ) + 6(-241.8kJ)] - [49.04kJ +15(0)]                                        = -6221.84 kJ Thus the amount of benzene requred to give the 2570 kJ =2570/ 6221.84)*78g/mole                                                                                       = 32.21g o fbenzene required.                                                                                                                  = [12(-393.5kJ) + 6(-241.8kJ)] - [49.04kJ +15(0)]                                        = -6221.84 kJ Thus the amount of benzene requred to give the 2570 kJ =2570/ 6221.84)*78g/mole                                                                                       = 32.21g o fbenzene required.                                                                          

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