Specific+Heat

Specific Heat //from dvapphysics.wikispaces, the free AP Physics wiki that anyone in Mr. Adkin's class can edit////.toc//

__**Definition**__
//Specific Heat is the amount of energy required to raise the temperature of one kilogram of a substance 1 degree Celsius. Every substance has a different specific heat which is a different amount of energy per unit mass to change the temperature 1 degree Celsius.//

__**Equation**__
//ΔT= Tf- Ti// //which is the change of the temperature of the substance.// //m is mass// //and Q is the quantity of energy that is transferred to the mass// //so the Specific Heat is// //c= Q/m//ΔT The units are in Joule per kilogram-degree Celsius. We can also can express it in terms of the energy needed Q= mcΔT

**__Examples__**
1. The energy required to raise the temperature of .5kg of water by 3 degrees Celsius would be...?

2. How much heat is needed to raise the temperature of 2.0 kg of copper from 20.0°C to 70.0°C?

3. A 1.0 kg aluminum block has an initial temperature of 10.0°C. What will the final temperature of the aluminum block be if 3.0x104 J of heat is added?

4. The energy required to raise the temperature of 3.0 kg of ice by 10°C would be...?

5.How much heat is needed to raise the temperature of 6.0 kg of silver from 35°C to 100°C?

6. Find the amount of energy required to raise the temperature of Mercury from 20°C to 300°C?

__**Answers**__
1. Q=mcΔT Q=(.5kg) (4186K/kg °C) (3°C) Q=6.28x10 3 J

2. Q= mcΔT Q= (2) (3.9x 102)(50) Q= 3.9x104 J

3. Given: m= 1.0kg; Q= 3.0x104J c= 9.0 x 102 J/ kg °C

Q= mcΔT ΔT=Q/mc =3.0x104J/ (1.0kg)(9.0x102 J/kg°C) =33°C 33+10=43°C

4.Q= mcΔT Q= (3kg)(2090 K/kg°C)(10°C) Q= 6.27x104J

5.