“Heating” or “cooling” of a substance results in a change of i

1.	“Heating” or “cooling” of a substance results in a change of its state—Explain giving reasons.
Answer» ong>Answer: Heating a substance makes the MOLECULES move faster. COOLING a substance makes the molecules move slower. Explanation: 1)When heat is added to any substance, the particles GAIN energy and vibrates(with more speed) or vigorously about their fixed positions, forcing each other further apart. Order of expansion Gas>Liquid>Solid 2) Increase in temperature: When HEATED there is increase in kinetic energy and particles move at higher speed. Since temperature is a measure of average Kinetic Energy, the temperature increases.

“Heating” or “cooling” of a substance results in a change of its state—Explain giving reasons.

Answer»

ong>Answer:

Heating a substance makes the MOLECULES move faster. COOLING a substance makes the molecules move slower.

Explanation:

1)When heat is added to any substance, the particles GAIN energy and vibrates(with more speed) or vigorously about their fixed positions, forcing each other further apart.

Order of expansion Gas>Liquid>Solid

2) Increase in temperature:

When HEATED there is increase in kinetic energy and particles move at higher speed. Since temperature is a measure of average Kinetic Energy, the temperature increases.

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