(a)
Interpretation:
Concept introduction:
The standard enthalpy of reaction is calculated by the summation of standard enthalpy of formation of the product minus the summation of standard enthalpy of formation of product at the standard conditions. The formula to calculate the standard enthalpy of reaction
Here, m and n are the
(a)
Answer to Problem 6.91P
Explanation of Solution
The balanced chemical equations for the combustion of paraffin
The standard state of oxygen is
The formula to calculate the standard enthalpy for first reaction
Substitute
The formula to calculate the standard enthalpy for second reaction
Substitute
The formula to calculate the standard enthalpy for third reaction
Substitute
(b)
Interpretation:
The heat released when a
Concept introduction:
Heat
The heat released by the system is negative and the heat taken by the system is positive.
The amount of heat released by the system is equal to the amount of heat absorbed by the surrounding.
(b)
Answer to Problem 6.91P
The heat released when a
Explanation of Solution
The formula to calculate heat released when
Substitute
The heat released when a
(c)
Interpretation:
The heat released when
Concept introduction:
Heat
The heat released by the system is negative and the heat taken by the system is positive.
The amount of heat released by the system is equal to the amount of heat absorbed by the surrounding.
(c)
Answer to Problem 6.91P
The heat released is
Explanation of Solution
Consider
The formula to calculate moles of candle
Substitute
The formula to calculate heat released when candle burns is as follows:
Substitute
The heat released is
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