posted by Carolyn .
Determine the energy in K calories needed to convert a one pound block of ice to steam
Is the block of ice at zero C? If so, Convert 1 pound ice to grams, then
q1 = heat to melt ice to liquid.
q1 = mass ice x heat fusion(in cal).
q2 = heat to raise T of water (melted ice) to 100 C.
q2 = grams x spcific heat(in cal) x (Tfinal-Tintial)
q3 = heat to convert liquid water at 100C to steam at 100 C.
q3 = mass water x heat vaporication.
Total Q = q1 + q2 + q3.
Then convert calories to kilocalories.