How much heat energy, in kilojoules, is required to convert 650g of ice at 18.0C to water at 250C ? Express your answer to three significant figures and include the appropriate units. The unit you entered is not recognized Review a ust of acceptable units. No credit lost. Try again How long would it take for 150mol of water at 100.0C to be converted complelely into sleam it heat were added at a constant raee of 16 o J/s ? Express your answer to three significant figures and include the appropriate units