# Resistance to change in temperature?

1. Jan 3, 2010

### davetheant

I was wondering, after looking at a pot of hot water today, whether a large amount of hot water has more resistance to change in temperature than a small pot of water. I thought maybe liquids had a sort of inertia when it comes to temperature; maybe a larger amount could stay hot for longer than a smaller amount. Is this true? And if so, is there an equation that someone could give me? Thanks.

2. Jan 3, 2010

### ZapperZ

Staff Emeritus
Look at the definitions (in words) of "heat capacity" and "specific heat capacity".

Zz.

3. Jan 3, 2010

### Crusoe

All substances have a "specific heat capacity", which is a measure of the material's capacity to store heat. This is sometimes described as "thermal mass", a useful but not entirely accurate analogy. For example, water has a higher specific heat capacity than air.

http://en.wikipedia.org/wiki/Specific_heat_capacity

The total heat stored in an object is proportional to the quantity of it; so the amount of heat stored in 1kg of water is half that of 2kg of water.

4. Jan 3, 2010

### davetheant

thanks a lot guys