What mass of water can be melted at 0°C if 2.75kJ of energy are used? (Ive been stuck on this one forever)

In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?

What happens to the average kinetic energy of a gas when the particles of the gas collide against each other at a constant temperature and volume? explain your answer.

How much heat is added if 0.814g of water increase in temperature by 0.351 degree c?