Answer:Heat released in kilo Joule per gram of benzene when reacted with oxygen is 0.628 kJ/g.
Explanation:
The standard enthalpy of formation of benzene is 49.04 kJ/mol. Same amount of energy will be released on combustion of 1 mol of benzene.
[tex]2C_6H_6+8O_2\rightarrow 6CO_2+4H_2O,\Delta H=-49.04kJ/mol[/tex]
Mass of 1 mol of benzene = 78 g
1 mole of benzene on combustion gives = 49.04 kJ
78 g of benzene on combustion gives = 49.04 kJ
1 g of benzene on combustion will give = [tex]\frac{49.04 kJ}{78 g}=0.628 kJ[/tex]
Heat released in kilo Joule per gram of benzene when reacted with oxygen is 0.628 kJ/g.
Answer: -41.83kg/g
Step 1 : set equations and balance
Step 2 : standard enthalpies of for all
Step 3: products site- reactants side
Step 4: conversion to gram
