Question

if a gas is expanded at constant temperature
A) the pressure decreases

the kinetic energy of the molecules remains the same

third the kinetic energy of the molecules decreases

4th the number of molecules of the gas increases

Answer 1

hey ,

⏩pressure is inversely proportional to the volume at constant temperature Hence a) is correct

⏩average kinetic energy of gas is directly proportional to Absolute Temperature and b) is correct

⏩expansion at constant temperature cannot change the number of molecules and D) is correct


Thanks!

Answer 2

Answer:

• Gas molecules exert no attractive or repulsive forces on each other or the container walls; therefore, their collisions are elastic (do not involve a loss of energy). The average kinetic energy of the gas molecules is proportional to the kelvin temperature of the gas.