How does the solubility of a gas in a solvent depend on pressure and temperature ? Increasing the partial pressure of the gas while decreasing the temperature increases the solubility of the gas. Increasing the partial pressure of the gas while increasing the temperature increases the solubility of the gas. Decreasing the partial pressure of the gas while decreasing the temperature increases the solubility of the gas. Decreasing the partial pressure of the gas while increasing the temperature increases the solubility of the gas. Gas solubility is unaffected by pressure or temperature.