Required practical - Specific heat capacity (AQA GCSE Physics): Flashcards

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Required practical - Specific heat capacity
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What is specific heat capacity?

Energy needed to heat 1 kg of a substance by 1°C

Meaning of 'specific' in specific heat capacity

For 1 kg of mass

Does water have high or low specific heat capacity?

High

Formula for specific heat capacity

c=V×I×tm×Δθc = \frac{V \times I \times t}{m \times \Delta\theta}

Units of specific heat capacity

J/kg°C

Specific heat capacity of water value

4200 J/kg°C

Why use insulation in the experiment?

Stops heat escaping to surroundings

How often should you take temperature readings?

Every 30 seconds

Two electrical values to record

Voltage (VV) and current (II)

What temperature does ice stay at while melting?

0°C

Why does temperature stay constant during melting?

Energy changes state, not temperature

Energy to heat 1 kg water by 1°C

4200 J

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