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Question

a) Define Dalton's partial pressure law.
b) Critical temperature for $${ CO }_{ 2 }$$ and $${ CH }_{ 4 }$$ are $$31.1$$ and $$-81.9$$ respectively. Which of these has stronger inter-molecular forces and why?


Solution

Solution:-
(a) Dalton's law of partial pressures $$\rightarrow$$ It states that in a mixture of non-reacting gases, the total pressure exerted is equal to the sum of the partial pressures of the individual gases.
$${P}_{total} = {P}_{1} + {P}_{2} + ..... + {P}_{n}$$
(b) The maximum temperature at which a gas can be converted into a liquid by an increase in pressure is called its critical temperature. This means that the intermolecular forces of attraction between the molecules of a gas are directly proportional to its critical temperature.
Since the critical temperature for $$C{O}_{2}$$ is greater than that of another gas. Hence, intermolecular forces of attraction are stronger in the case of $$C{O}_{2}$$.

Chemistry

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