posted by Pegs on .
There is a problem that asks if an ice cube is dropped into nitrogen (boiling point of nitrogen is 77K), how much nitrogen will evaporate?
heat lost by ice = heat gained by nitrogen
But by is the equation
m(ice)*c(ice)*deltaT = m(nitrogen)*L(vaporation) ?
Why isn't it
m(ice)*c(ice)*deltaT + m(ice)*L(ice) = m(nitrogen)*L(vaporation)
because aren't you melting the ice into water too?
thanks for the help.