# Homework Help: Specific Heat Problem and boiling water

1. Nov 29, 2009

### clutch12

1. The problem statement, all variables and given/known data
140 grams of boiling water (temperature 100° C, heat capacity 4.2 J/gram/K) are poured into an aluminum pan whose mass is 1100 grams and initial temperature 24° C (the heat capacity of aluminum is 0.9 J/gram/K).
After a short time, what is the temperature of the water?

2. Relevant equations
Q=mc delta t

3. The attempt at a solution

140g(4.2J/K/gram)(T-100) = 1100g(0.9 J/K/gram)(24-T)
588T-58800 = 23760 - 990 T
588T + 990 T = 23760 + 58800
1578 T = 82560
T= 52.319

Am I doing this right?

2. Nov 29, 2009

### Delphi51

Looks good to me, clutch.

3. Nov 29, 2009

### clutch12

Alright and when im determining the temperature am i subtracting 100-52.319 or no?

4. Nov 29, 2009

### Delphi51

No, 52.319 is the final answer. 100-52.319 would be the change in temperature of the water.

5. Nov 29, 2009

### clutch12

oh ok thanks for clearing that up