What must the final volume be for the pressure of the gas to be 1.62 atm at a temperature of 334 K

The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. the change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. the minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kj/mol.

How will the volume of a gas be affected if the pressure is tripled, but the temperature remains the same?

Why is the melting of ice a physical change ?