Liquid benzene reacts according to the balanced equation. If a total of 1635 kJ

Question

Liquid benzene reacts according to the balanced equation. If a total of 1635 kJ of heat is generated in the reaction as written, how many moles of CO2 are produced? Express your answer to three significant figures.

2C6H6(l) + 15O2(g) ? 12CO2(g) + 6H2O(l)


Enthalpy (kJ) ?H = -3589.00 Molar Mass (g/mol) C6H6 78.114 O2 31.999 CO2 44.001 H2O 18.015 Liquid benzene reacts according to the balanced equation. If a total of 1635 kJ of heat is generated in the reaction as written, how many moles of CO2 are produced? Express your answer to three significant figures.

2C6H6(l) + 15O2(g) ? 12CO2(g) + 6H2O(l)


Enthalpy (kJ) ?H = -3589.00 Molar Mass (g/mol) C6H6 78.114 O2 31.999 CO2 44.001 H2O 18.015

Explanation / Answer

from the equation it is clear that 2moles of C6H6 give 3589 KJ of energy

so no of moles giving 1635KJ of energy = 2*1635/3589 = 0.9111 moles

2 moles of CO2 produces 12 moles of CO2

so 0.9111 moles of C6H6 produces = 12*0.9111/2 = 5.4667 moles

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