# Investigate Specific Heat Capacity Required Practical

## Experimental Set Up

Investigating the specific heat capacity of a substance is a required practical!

The experimental set-up looks like this:

We have:

- Copper block wrapped in insulation, with two holes for a thermometer and heater
- Thermometer
- Pipette to put oil in the thermometer hole
- 30 W heater
- 12 V power supply
- Ammeter
- Insulation to wrap around the blocks
- Stop watch or stop clock

## Method

- Measure and record the mass of the copper block in kg.
- Place a heater in the larger hole in the block.
- Use the pipette to put a small amount of oil in the hole.
- Put the thermometer in this hole.
- Switch the power pack to
**12V**. Switch it on. - Measure the temperature and switch on the stop clock.
- Record the temperature every minute for 10 minutes.
- Calculate the power of the heater in Watts. To do this, multiply the ammeter reading by the voltmeter reading.
- Calculate the work done by the heater in Joules. To do this, multiply the time in seconds by the power of the heater.

## Graph

The graph would have the energy supplied on the x axis and the temperature on the y axis.

Specific heat capacity could be calculated by finding the gradient of the line. This can be done by the finding the change in y and dividing it by the change in x.

- How do you calculate specific heat capacity from the graph?
- Gradient

Explanation:*Finding the gradient.*