How Much Power Does the Heat Engine Generate?

[kikko]

Homework Statement

The hot reservoir of a heat engine is steam at 100 Celsius while the cold reservoir is ice at 0Celsius In 1.4 hours of operation, 12 kg of steam condenses and 60 kg of ice melts.

What is the power output of the heat engine?

Homework Equations

Efficiency = 1-(Qc)/(Qh)
Wout = Qnet = Qh-Qc
/\Eth = W+Q

The Attempt at a Solution

I have no clue on where to start this one, something dealing with temperature differences and derivatives, I believe.

 

[ehild]

If you have no clue try to find out what the symbols in the equations mean. What are Qc an Qh? Can you determine them from the data given (mass of steam condensed, mass of ice melted)?

ehild