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The entropy of a sample of CO2 increases as the CO2 changes from A solid to gasB gas to liquidC gas to solidD liquid to solid

Question

The entropy of a sample of CO2 increases as the CO2 changes from

  • A solid to gas
  • B gas to liquid
  • C gas to solid
  • D liquid to solid
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Solution

The entropy of a sample of CO2 increases as the CO2 changes from solid to gas. So, the correct answer is A. Solid to gas.

Here's why:

Entropy is a measure of the disorder or randomness of a system. The more disordered a system is, the higher its entropy.

In the solid phase, the molecules of CO2 are closely packed together in a regular pattern and have less freedom to move around, so the disorder is low and so is the entropy.

When CO2 changes from a solid to a gas, the molecules break free from the regular pattern and can move around freely

This problem has been solved

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