# Homework Help: Phone a friend question and specific heat

1. Mar 21, 2006

### physicskillsme

Suppose I have the following materials with specific heat values as given:

Material A 5500J/kg.K

Material B 3900J/kg.K

Material C 9000J/kg.K

If I supply the same amount of heat to each which one will have the largest temperature rise?

More importantly why?

2. Mar 21, 2006

### chroot

Staff Emeritus
Can you give me a definition of specific heat? Look it up in your book, if necessary.

- Warren

3. Mar 21, 2006

### physicskillsme

Q=mc(deltaT)

Q=Energy, c=specific heat m=mass delta T is change of temperature

Specfic heat is #J/kg.K where Kelvin is the Temp and J is joules.

The specific heat of a material is the amount of heat required to raise 1 Kg sample of the material, one Kelvin.

4. Mar 22, 2006

### chroot

Staff Emeritus
That sentence is all you need to answer the question.

- Warren

5. Mar 22, 2006

### physicskillsme

So Material B because it has the lowest specific heat rating and won't require as much heat as the others?

6. Mar 22, 2006

### Nomy-the wanderer

Yes, therefore you use materials with high specific heat in cooling systems...

7. Mar 22, 2006

### physicskillsme

Okey Dokes - Thanks Nomy and Chroot - I appreciate your help.