# Physics heat problem! Using calories.

1. Oct 31, 2013

### astru025

1. The problem statement, all variables and given/known data

How many calories will it take to raise the temperature of a 44 g gold chain from 20°C to 125°C?

2. Relevant equations

You are trying to raise the temperature of 44 g. of gold by 105 degrees celsius. I tried 44 x 105 but this answer was incorrect.

3. The attempt at a solution
The answer is got was 4620 cal. But this was not correct.

2. Oct 31, 2013

### Staff: Mentor

You also have to multiply by the heat capacity of gold(solid) to get the number of calories.

Chet

3. Oct 31, 2013

### CWatters

They told you it was gold because different materials have different thermal properties. It takes more energy to heat up 44g of water by 105C then it does to do the same if it's gold, wood, air...

See the table of data for various materials down here..
http://en.wikipedia.org/wiki/Heat_capacity#Table_of_specific_heat_capacities

Note the units. If you use this data you will have to convert the resulting energy from Joules to Calories.

4. Oct 31, 2013

### astru025

Thank you very much! I came up with the correct answer