Posted by ami on .
What mass of steam at 100°C must be added to 1.00 kg of ice at 0°C to yield liquid water at 15°C?

phy 
bobpursley,
The sum of heats gained is zero (on has negative heat gained).
Add the heats.
1kg*Lfice+1kg(cwater)(150)+M*Lvsteam+M*cwater*(15100)=0
solve for M