When a substance changes from a solid to a gas

Asked by admin @ 26/11/2021 in Chemistry viewed by 285 People

Complete the following sentences: 1. The phase change in which a substance changes from a liquid to a gas is ______.

a. deposition
b. sublimation
c. condensation
d. vaporization
2. The phase change in which a substance changes from a solid to a liquid is _____.
a. freezing
b. melting
c. sublimation
d. condensation
3. The phase change in which a substance changes from a solid to a gas or vapor without changing to a liquid first is _____.
a. sublimation
b. deposition
c. vaporization
d. melting

Answered by admin @ 26/11/2021

Answer: 1. d. vaporization

2. b. melting

3. a. sublimation

Explanation: There are three states of matter, namely solid , liquid and gas.

In solid the particles are closely packed as the inter molecular forces of attraction are strongest. as they are heated, the kinetic energy of the molecules increases and thus the molecules start moving farther and convert to liquid state. The process is called melting.

When liquid is further heated, the molecules gain more kinetic energy and molecules move farther and convert to gaseous state and the process is called vaporization.

When a solid directly converts to gaseous state without changing into liquid first is called sublimation. Example: Napthalene

When a substance changes from a solid to a gas

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