Which of the substances A, B or C has the highest specific heat? The temperature vs time graph is shown.
Correct answer: C. C
- A. A
- B. B
- C. C
- D. All have equal specefic heat
Explanation
The substance which gets heated more or under application of heat for a longer period of time, is expected to have a greater specific heat quotient. In our graph, A undergoes heating under high temperature but for rather a short period of time. Hence, its heating capacity is quite lesser than the rest of the given substances. Body B undergoes heating for a greater period of time than that of substance A, but lesser than C. Thus, body C is said to be having greater specific heat than the other substances.
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About Molar Specific Heat of a Gas
Molar specific heat is the heat required to raise the temperature of one mole of a gas by one kelvin, expressed through Q = nCΔT. Questions compare the constant volume value Cv with the constant pressure value Cp, apply the ideal gas relation Cp − Cv = R, and identify how the thermodynamic process affects heat capacity.
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