Arrange the following in the decreasing order of kinetic energy of molecules-Steam at nbsp-101-CWater nbsp-at nbsp-80-CWater at nbsp-50-CIce at nbsp-10-C

The correct option is The temperature of a substance nbsp;is a measure of the average kinetic energy of its molecules. Atoms vibrate faster at higher temperat ...

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Standard VIII

Physics

Heat as Kinetic Energy

Arrange the f...

Question

Arrange the following in the decreasing order of kinetic energy of molecules.

Steam at

101^{\circ} C

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Water at 80^{\circ} C

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Water at

50^{\circ} C

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Ice at

- 10^{\circ} C

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Solution

The temperature of a substance is a measure of the average kinetic energy of its molecules. Atoms vibrate faster at higher temperature and faster the vibration of atoms, more is its kinetic energy. Thus, the kinetic energy of molecules are as follows -
Steam at $101^{\circ} C$ > Water at $80^{\circ} C$ >Water at $50^{\circ} C$ > Ice at $- 10^{\circ} C$ .

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Similar questions

Q. 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.

Q. Arrange the following in the decreasing order of kinetic energy of molecules.
1. Steam at

101^{\circ}

C
2. Water at

80^{\circ}

C
3. Water at

50^{\circ}

C
4. Ice at

- 10^{\circ}

20 gm

ice at

- 10^{\circ} C

is mixed with

m gm

steam at

100^{\circ} C

. The minimum value of

m

so that finally all ice and steam converts into water at

0^{\circ} C

(

Use: specific heat and latent heat as

C_{i c e} = 0.5 cal/gm^{\circ} C, C_{water} = 1 cal/gm^{\circ} C, L_{f u s i o n}

= 80 cal/gm

and

L_{v a p o r}

= 540 cal/gm

)

Q. Arrange the following in the decreasing order of kinetic energy of molecules.

20 gm

ice at

- 10^{\circ} C

is mixed with

m gm

steam at

100^{\circ} C

. The minimum value of

m

so that finally all ice and steam converts into water is

[

Use, specific heat and latent heat as

C_{i c e} = 0.5 cal/gm^{\circ} C, C_{water} = 1 cal/gm^{\circ} C, L_{m e l t}

= 80 cal/gm

and

L_{v a p o r}

= 540 cal/gm

]

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