KCET 2020 | Heat and Thermodynamics Question 17 | Physics

A certain amount of heat energy is supplied to a monoatomic ideal gas which expands at constant pressure. What fraction of the heat energy is converted into work?

$$\frac{2}{3}$$

$$\frac{2}{5}$$

$$\frac{5}{7}$$

KCET 2019

MCQ (Single Correct Answer)

-0

A thermodynamic system undergoes a cyclic process $$A B C$$ as shown in the diagram. The work done by the system per cycle is

KCET 2019 Physics - Heat and Thermodynamics Question 13 English

750 J

$$-$$1250 J

$$-$$750 J

1250 J

KCET 2019

MCQ (Single Correct Answer)

-0

One mole of $$\mathrm{O}_2$$ gas is heated at constant pressure starting at $$27^{\circ} \mathrm{C}$$. How much energy must be added to the gas as to double its volume?

Zero

450 R

750 R

1050 R

KCET 2018

MCQ (Single Correct Answer)

-0

A cup of tea cools from $65.5^{\circ} \mathrm{C}$ to $62.5^{\circ} \mathrm{C}$ in 1 min in a room at $22.5^{\circ} \mathrm{C}$. How long will it take to cool from $46.5^{\circ} \mathrm{C}$ to $40.5^{\circ} \mathrm{C}$ in the same room?

4 min

2 min

1 min

3 min

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