Combustion of 1 mole of benzene is expressed as .

The standard enthalpy of combustion of 2 mol of benzene is .

Given:
1. Standard enthalpy of formation of 1 mol of , for the reaction is .
2. Stan

Question

Combustion of 1 mole of benzene is expressed as .

The standard enthalpy of combustion of 2 mol of benzene is .

Given:
1. Standard enthalpy of formation of 1 mol of , for the reaction  is .
2. Standard enthalpy of formation of 1 mol of , for the reaction  is .
3. Standard enthalpy of formation of 1 mol of , for the reaction  is .

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Strategy:
 Calculate the standard enthalpy of combustion for  mole of benzene using the enthalpies of formation (), then scale the result for  moles.

Step 1: Calculate  for 1 mole
Reaction:

.

Step 2: Calculate for 2 moles
.
The magnitude .

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