Exams › JEE Main › Chemistry

When the temperature of neon is increased from 20°C to 40°C, by what factor does the mean kinetic energy of its atoms change?

1. 313/293
2. √313/293
3. 1/2
4. 2

Correct answer: 313/293

Solution

Mean kinetic energy = (3/2)kT scales linearly with absolute T, so the factor is 313/293 (40C=313K, 20C=293K), not the square root of it.

Related JEE Main Chemistry questions

• A sample of gas has a volume of 300 cc at 27°C under a pressure of 620 mm. What will its volume be at 47°C and 640 mm pressure?
• Which gas is expected to show the greatest departure from ideal-gas behavior?
• Equal amounts (in moles) of hydrogen gas and oxygen gas are kept in a vessel that has a tiny pinhole, allowing both gases to effuse out. By the time one-half of the hydrogen has escaped, what fraction of the oxygen has escaped?
• Which of the following statements is incorrect regarding how raising the temperature affects the distribution of molecular speeds in a gas?
• As stated by the kinetic theory of gases, how does an ideal gas molecule move during the interval between two consecutive collisions?
• For 1 mole of an ideal gas maintained at a fixed temperature T, what is the nature of the graph between log(P) and log(V), where P denotes pressure and V denotes volume?

⚔️ Practice JEE Main Chemistry free + battle 1v1 →