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Thermodynamics quick check

A quick check of 3 questions. After you submit, each question shows the right answer and why.

3 of 9 questions, Advanced level. Aimed at the Advanced level, your current depth. Questions you have not answered yet come first.

Show all 9 questions

ScientistQuestion 1 of 3

How much heat, in kilojoules to one decimal place, is needed to warm 2.0 kg of water by 5.0 K? Take c = 4186 J/(kg·K).

AdvancedQuestion 2 of 3

1200 J of heat flows reversibly into a large reservoir held at 300 K. What is the reservoir's entropy change, in J/K?

AdvancedQuestion 3 of 3

What is the maximum possible efficiency, as a percentage, of a heat engine working between reservoirs at 600 K and 300 K?