GCSE Physics - Internal Energy and Specific Heat Capacity #28

The video tutorial explains the concept of internal energy and its relation to temperature, focusing on kinetic energy. It introduces specific heat capacity, illustrating how different materials require varying amounts of energy to change temperature. An equation is derived to calculate temperature change, demonstrated through a sample problem. Practical considerations, such as energy loss in real-life scenarios, are also discussed.

What is the primary component of internal energy that affects temperature changes?

• Potential energy

• Nuclear energy

• Kinetic energy

• Chemical energy

Which of the following best describes specific heat capacity?

• The energy stored in the chemical bonds of a substance

• The energy needed to raise the temperature of 1 kg of a substance by 1°C

• The energy required to change the state of a substance

• The energy released when a substance is compressed

How much energy is required to raise the temperature of 1 kg of mercury by 1°C?

• 1000 Joules

• 500 Joules

• 139 Joules

• 4200 Joules

In the example provided, what is the final temperature of 800 grams of water after adding 20 kilojoules of energy?

• 22.0°C

• 24.5°C

• 25.95°C

• 28.0°C

What is a real-world factor that might prevent the calculated temperature increase from being achieved?

• Excessive stirring of the substance

• Incorrect specific heat capacity value

• Energy loss to the surroundings

• Inaccurate measurement of mass