Mass of substance in a system (Heat transfer)

[Zoey Brown]

Homework Statement

A solid, 2.00 kg cube of nitrogen at -220.0oC is added to a 1.00 kg mixture of ice and

water at 0.00 oC. If the final temperature of the mixture is -100.0 oC, how much ice was

there in the original mixture?

Homework Equations

e=mct
e=mLv/f

The Attempt at a Solution

Don't know where to start

 

[rude man]

Homework Statement

A solid, 2.00 kg cube of nitrogen at -220.0oC is added to a 1.00 kg mixture of ice and

water at 0.00 oC. If the final temperature of the mixture is -100.0 oC, how much ice was

there in the original mixture?

Homework Equations

e=mct
e=mLv/f

The Attempt at a Solution

Don't know where to start

heat gained = heat lost

 

[rude man]

[Mentor's Note: The quoted post was deleted, but I'm leaving the quote since it should help the OP.]

Hi Zoey,

First you have to start off by calculating how much energy it takes to make nitrogen go to -100 degrees Celsius. Try doing this and the number you should get is 476 400 Joules.

Did you remember that N₂ is liquid below -196C and gas above that temperature?
Oops, worse than that:
solid below -210C, liquid -210 < T < -196, gas at T > -196.
Need 3 specific heats and 2 latent heats!