
(a)
Interpretation: The energy transferred to water on combustion of a given amount of propanol is to be calculated.
Concept introduction: Specific heat is defined as quantity of heat required to raise the temperature of one gram substance by one Kelvin. It is represented by ‘c’.
(a)

Answer to Problem 4E
The heat absorbed is
Explanation of Solution
The quantity of heat can be calculated by using formula:
Given data:
Substituting the values in formula:
(b)
Interpretation: The amount of kilocalories transferred in a process that involves combustion of propanol is to be calculated.
Concept introduction: The given amount of energy is to be converted into kilocalories.
The conversion factor is:
(b)

Answer to Problem 4E
Explanation of Solution
As,
Therefore,
(c)
Interpretation: The kilojoules of energy transferred in a process that involves combustion of propanol needs to be determined.
Concept introduction: The given amount of energy is to be converted into kilocalories.
The conversion factor is:
(c)

Answer to Problem 4E
Explanation of Solution
As,
Therefore,
(d)
Interpretation: The temperature increase for
Concept introduction:
Specific heat is defined as quantity of heat required to raise the temperature of one gram substance by one Kelvin. It is represented by ‘c’.
The quantity of heat can be calculated by using formula:
(d)

Answer to Problem 4E
There will same increase in temperature on increasing the volume of water.
Explanation of Solution
Change in temperature depends on quantity of substance which is added to water. So on changing the volume of water, temperature change will remain same.
(e)
Interpretation: The temperature increase for
Concept introduction:
Specific heat is defined as quantity of heat required to raise the temperature of one gram substance by one Kelvin. It is represented by ‘c’.
The quantity of heat can be calculated by using formula:
(e)

Answer to Problem 4E
Increase in temperature will become double when mass of substance is reduced to half of its value.
Explanation of Solution
According to the formula, increase in temperature is inversely proportional to the mass of substance added. Therefore, increase in temperature will become double when mass of propanol is decreased from
This can be represented as follows:
Chapter U5 Solutions
Living By Chemistry: First Edition Textbook
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