Consider a collision between an oxygen molecule and a hydrogen molecule in a mixture of oxygen and hydrogen kept at room temperature. Which of the following are possible?
(a) The kinetic energies of both the molecules increase.
(b) The kinetic energies of both the molecules decrease.
(c) kinetic energy of the oxygen molecule increases and that of the hydrogen molecule decreases.
(d) The kinetic energy of the hydrogen molecule increases and that of the oxygen molecule decreases.
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Kinetic energy of the oxygen molecule increases and that of the hydrogen molecule decreases and The kinetic energy of the hydrogen molecule increases and that of the oxygen molecule decreases are possible
Explanation:
- The postulates that collision between molecules is elastic according to Kinetic theory.
- This means kinetic energy is conserved after any collision, because while one gains kinetic energy, another loses it.
- Both (c) and (d) options consider kinetic energy conservation in the collision.
- So, the answers (The oxygen molecule's kinetic energy is increasing and that of the hydrogen molecule is decreasing or the hydrogen molecule's kinetic energy is increasing, and that of the oxygen molecule is decreasing.) are correct.
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