GCSE AQA Physics Internal Energy & Energy Transfers: Figure 12 shows the equipment a

Question

Figure 12 shows the equipment a student used to determine the specific heat capacity of iron.

The iron block the student used has two holes, one for the heater and one for the thermometer.

Before the power supply was switched on, the thermometer was used to measure the temperature of the iron block.

The student left the thermometer in the iron block for a few minutes before recording the initial temperature.

Suggest why.

Figure 13 shows how the temperature changed after the power supply was switched on.

The energy transferred to the iron block between 5 and 10 minutes was 26 000 J.

The mass of the iron block was 2.0 kg.

Calculate the specific capacity of iron.

Use information from Figure 13 and the Physics Equations Sheet.

Specific heat capacity = _______________________ J/kg °C

The student repeated the investigation but wrapped insulation around the iron block.

What effect will adding insulation have had on the investigation? Tick (✓) two boxes.

The calculated specific heat capacity will be more accurate.

The iron block will transfer thermal energy to the surroundings at a lower rate.

The power output of the heater will be lower than expected.

The temperature of the iron block will increase more slowly than expected.

The uncertainty in the temperature measurement will be greater.

Figure 12 shows the equipment a student used to determine the specific heat capacity of iron - AQA - GCSE Physics - Question 9 - 2023 - Paper 1