Which method would increase the solubility of a gas? increasing the pressure stirring the solvent quickly increasing the temperature decreasing the amount of solvent

Option (a) is the correct answer.

Explanation:

Solubility of a gas can be increased by increasing the pressure on a gas. As on increasing the pressure, the molecules come closer to each other and the number of gas molecules will decrease as the molecules are dissolving due to increase in pressure.

On increasing the temperature, the kinetic energy of molecules will increase. Therefore, the gas molecules will move randomly rather and will not be soluble.

Thus, we can conclude that on increasing the pressure we can increase the solubility of a gas.

answer: the enthalpy of the overall chemical reaction is +87.88 kj or +88 kj.

according to hess's law, the overall enthalpy of a reaction is the difference between the sum of enthalpy values of all the products and the sum of enthalpy values of all the reactants.

δh(reaction) = ∑nδh(products) - ∑nδh(reactants)

δh(reaction) = [δh +δh] - [δh]

δh(reaction) = [1(-287.02) + 1(0) ] - [1(-374.9)] kj = +87.88 kj

here, δh (pcl3) = -287.02 kj, δh(cl2) = 0, δh(pcl5) = -374.9 kj

therefore, enthalpy of the overall reaction is +87.88 kj or +88 kj.

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