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1 (a) Which graph shows the way in which the average kinetic energy of the molecules of a gas changes with temperature? Put a cross (X) in the box next to your answer - Edexcel - GCSE Physics - Question 1 - 2013 - Paper 1
Question 1
1 (a) Which graph shows the way in which the average kinetic energy of the molecules of a gas changes with temperature? Put a cross (X) in the box next to your answ... show full transcript
Worked Solution & Example Answer:1 (a) Which graph shows the way in which the average kinetic energy of the molecules of a gas changes with temperature? Put a cross (X) in the box next to your answer - Edexcel - GCSE Physics - Question 1 - 2013 - Paper 1
Step 1
Which graph shows the way in which the average kinetic energy of the molecules of a gas changes with temperature?
Answer
The correct answer is graph C. This graph shows a linear relationship between the average kinetic energy of gas molecules and temperature. As the temperature increases, the average kinetic energy also increases proportionally, reflecting the direct relationship defined by the kinetic molecular theory. According to this theory, the average kinetic energy (KE) of gas molecules can be expressed in relation to temperature (T) using the formula:
KE ext{ (average)} = rac{3}{2} k T
where is the Boltzmann constant. Hence, graph C accurately depicts this linear correlation.