How does active transport differ from passive transport

Initially, the balloon had 3.0 liters of gas at a pressure of 400 kpa and was at a temperature of 294 k. if the balloon is cooled to 277 k and its volume decreased to 1 l, what will the new pressure in the balloon be?

This chart represents the melting point of several substance. what besy explains the high melting point of the salt?

In what environment would mineral formation caused by high pressures and high temperatures most likely occur?