
Concept explainers
(a)
Interpretation:
The partial pressure of the water vapour is to be determined.
(a)

Explanation of Solution
Given Information: Table 9.2
The partial pressure of a gas in a mixture is defined as the force exerted by the molecules of that gas per unit area if it alone occupies the entire volume of the container in which the mixture is kept. It depends upon the mole fraction of the gas. The partial pressure of water vapor at different temperatures is standardized in table 9.2.
At
(b)
Interpretation:
The partial pressure of oxygen using the ratio of
(b)

Explanation of Solution
The molecular level image shows that there are
(c)
Interpretation:
The total pressure of the gas collected is to be determined.
(c)

Explanation of Solution
Dalton’s law of partial pressure states that in a mixture, the total pressure exerted by the mixture of gases is equal to the sum of partial pressures exerted by each individual gas.
The partial pressure of water vapor is
(d)
Interpretation:
The number of moles of oxygen gas collected is to be determined.
(d)

Explanation of Solution
The ideal gas equation states that the pressure
Here,
The volume of the collected gas is
Convert
Convert
Convert temperature units from degree Celsius to Kelvin as follows:
Convert temperature
Convert pressure units from
Convert pressure
Substitute
So, the number of moles of oxygen gas collected is
(e)
Interpretation:
The number of moles of
(e)

Explanation of Solution
The reaction is as follows:
According to the reaction,
So,
The number of moles of
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Chapter 9 Solutions
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