# Homework Help: Heat and melting ice

1. Apr 27, 2013

### tooperoo

1. The problem statement, all variables and given/known data
A)You have a tank containing 750 mL of water and a heater outputting a max of 400 W. If you start with the water at 25 degrees, how long till it reaches boiling point?

B) How much heat must be input to melt 1 gram of ice? What is the volume of meltwater does this produce?

2. Relevant equations

Conductivity for heat? Q/t = (k x A x delta temp)/ d
Thats all I can think of

3. The attempt at a solution
I have tried with the coductivity of heat formula but i dont there is enough information given.

I am so lost, I dont know where to start. Help please!

2. Apr 27, 2013

### Staff: Mentor

This is more like a thermodynamics problem than a heat conduction problem. How many Joules of heat does it take to heat 750 ml of water from 25 C to 100 C? What is the definition of 1 Watt?

3. Apr 28, 2013

### CWatters

What chestermiller said. If not clear look up "heat capacity" and "Latent Heat" on wikipedia.