Edexcel IGCSE Physics 5 13p Thermal Energy Equation Questions
Find ΔT from starting and final temperatures, then substitute or rearrange the thermal energy equation using consistent units.
- Syllabus
- First assessment 2019
- Course
- Physics 4PH1
Exam points
- Find the temperature change from the initial and final temperatures, then use ΔQ = mcΔT to calculate the energy transferred.
- Rearrange ΔQ = mcΔT to find mass or specific heat capacity from energy, temperature change and the other known quantity.
- Rearrange the equation to find temperature change, then calculate the final temperature when the initial temperature is given.
- Use consistent units in ΔQ = mcΔT, including converting grams to kilograms and kilojoules to joules when required.
Edexcel IGCSE Physics 5 13p Thermal Energy Equation Questions question 1
Energy is transferred from the Sun to the Earth.
Solar panels use energy from the Sun to heat water.
A mass of 1100 kg of cold water is in the solar panels at an initial temperature of 20 degrees C.
Calculate the final temperature of this water after it has been heated by the Sun for 2 hours.
[specific heat capacity of water = 4200 J/kg degrees C]
final temperature = ............ degrees C
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