Question

A copper of mass 400g is heated until it's temperature becomes 250degree celcius. It is dropped into water weighing 200g at 50 degree celcius.calculate the mass of water vapour produced.
bobpursley
figure the heat in the copper. when dropped in water, it will make steam until it(the copper) is 100C.

heat copper loses : 400*ccu*(100-250)

amount of steam: that heat above (400*Ccu*(150))=masssteam(hvaporwater)

solve for mass steam.