I’m a junior in an honors chemistry class and i really need an idea for science fair. any recommendations that are level appropriate but not too difficult?

3. how much energy in joules is required to evaporate .0005 kg of liquid ammonia to vapor at the same temperature? 4. how much energy ( in megajoules ) is given up by .75 kg of water at 0c when it freezes to form ice at 0c? 5. explain how heat works between and at critical temperatures?

The tendency of water molecules to stick together is referred to as a) adhesion b) polarity c) cohesion d) transpiration e) evaporation

Calculate the concentration of all species in a 0.165 m solution of h2co3.