Question

We have three pieces of materials and we are required to heat
each of them from 15°C to 65°C? Choose the incorrect
amount of heat required for each of the case. The specific
heats, in cal/g. C, for aluminum, Pyrex, and platinum are
0.21, 0.20, and 0.032, respectively​

Answer 1

Answer:

Aluminum: 2.13 cal

Pyrex: 2.50 cal

Platinum: 0.48 cal

Explanation:

From the above question,

They have given :

Three pieces of materials and we are required to heat.

When a substance is heated, it gains thermal energy. Therefore, its particles move faster and its temperature rises. When a substance is cooled, it loses thermal energy, which causes its particles to move more slowly and its temperature to drop.

kJ measurE:

• Energy

The energy we get from food and drink is measured in kilojoules (kJ). This is the metric term for calorie. Kilojoules and calories represent the same thing. One calorie is about four kilojoules.

each of them from 15°C to 65°C

Aluminum: 2.13 cal

Pyrex: 2.50 cal

Platinum: 0.48 cal

Aluminum: 347.5 kilojoules

Pyrex: 527.5 kilojoules

Platinum: 438.5 kilojoules

Heat Affects the Volume of Solids, Liquids and Gases

As the average energy of particles increases, the space between the particles increases. They expand (increase their volume) as the temperature increases.

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