Consider the following data:

Heat of combustion of
Heat of combustion of
Heat of combustion of

The heat of formation of is (Nearest integer).

Question

Consider the following data:

Heat of combustion of 
Heat of combustion of 
Heat of combustion of

The heat of formation of  is    (Nearest integer).

Canvas Classes · Accepted Answer

Strategy:
 Use the enthalpy of combustion data to find the enthalpy of formation of ethanol using: .

Step 1: Write the formation reaction

Step 2: Apply Hess's Law

.
Nearest integer magnitude: .

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