you wish to combine two samples, one sample contains is solid water at 0 degree celsius.The other sample contains liquid water at 100 degree celsius,you want to combine both raise the temperature to 100 but boil off only 50 ml to gas phase keep the rest as liquid.How much energy is neededfor this?Both is 100ml(iceand liquid water)

Answer 1

I would do this is steps.
First, determine the mass of the ice.
mass ice = volume ice x density ice at 0C. You will need to look up the density at 0C.
Then
[mass H2O x heat fusion] + [mass melted ice x specific heat H2O x (Tfinal-0)] + [mass H2O @100 x specific heat H2O x (Tfinal-100)] = 0
Solve for Tfinal. That will give you the T of the ice/hot water after melting.

Then q = [mass H2O x specific heat H2O x (100-T from above)] + [50 g H2O x heat vap] = ?