Posted by **Carolyn ** on Saturday, June 11, 2011 at 4:15pm.

Determine the energy in K calories needed to convert a one pound block of ice to steam

- Chemistry -
**DrBob222**, Saturday, June 11, 2011 at 4:57pm
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.

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