At constant temperature, if the volume of a given mass of an ideal gas is doubled, then the density of the gas will
Correct answer: C. be 1/2 of the original value
- A. be doubled.
- B. remain constant
- C. be 1/2 of the original value
- D. be 1/4 of the original value
Explanation
Density is defined as the mass of a substance divided by its volume, mathematically expressed as ρ = m/V. If the volume is doubled, the new density becomes ρ = m/(2V), indicating that the density is halved. Therefore, the correct answer is that the density will be 1/2 of the original value. Options suggesting that the density doubles or remains constant are incorrect because they do not account for the inverse relationship between density and volume. Similarly, the suggestion that density becomes 1/4 of the original value is incorrect because it would require the volume to quadruple, not double.
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About Thermal Equilibrium and Heat
Thermal equilibrium means that bodies in contact have the same temperature and no net heat flows between them. The topic distinguishes heat from temperature, uses the zeroth law of thermodynamics, and covers heat transfer, specific heat capacity, thermal expansion and the conditions for reaching equilibrium.
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