Calculating Heat Energy Gained or Lost - Hewlett-Woodmere



Calculating Heat Energy Gained or Lost

Specific Heat - the heat required to raise the temperature of one gram of a substance one degree centigrade

Specific Heat = Joules / (mass x ˚C)

Joule - a metric unit of energy. One joule is equal to the energy transformed by the power of one watt operating for one second. 4.184 joule of heat energy (or one Calorie) is required to raise the temperature of 1 gram of water 1°C.

Joules = (Specific Heat) x (mass) x (temperature change)

Lost or Gained

Questions: Show work

1. How many joules are needed to raise 10g of copper 5˚C?

2. How many joules are needed to raise 100g of basalt 100˚C?

3. How many joules are need to raise the temp of 5g of ice from -50˚C to 0˚C?

4. How many joules are needed to melt 5g of ice?

5. How many joules are needed to raise the temperature of 5g of water from 0˚C to 100˚C?

6. How many joules are needed to vaporize 5g of water?

7. How many joules are needed to raise the temperature of 5g of water vapor from 100˚C to 150˚C?

8. How many joules are needed to raise the temperature of a 5g ice cube from -50˚C all the way to 150˚C?

................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download