Mechanical Engineering Exam > Mechanical Engineering Questions > When the gas is cooled at constant pressure,a...
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When the gas is cooled at constant pressure,
- a)its temperature increase but volume decreases
- b)its volume increases but temperature decreases
- c)both temperature and volume increases
- d)both temperature and volume decreases
Correct answer is option 'D'. Can you explain this answer?
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When the gas is cooled at constant pressure,a)its temperature increase...
**Answer:**
When a gas is cooled at constant pressure, there are two factors that come into play: the temperature and the volume of the gas.
**Boyle's Law:**
According to Boyle's Law, the volume of a gas is inversely proportional to its temperature, assuming the pressure remains constant. This means that as the temperature of the gas decreases, its volume will increase.
**Charles's Law:**
According to Charles's Law, the volume of a gas is directly proportional to its temperature, assuming the pressure remains constant. This means that as the temperature of the gas decreases, its volume will decrease.
**Combined Effect:**
When a gas is cooled at constant pressure, both Boyle's Law and Charles's Law come into play. The cooling of the gas causes the temperature to decrease, which would normally result in a decrease in volume according to Charles's Law. However, since the pressure is kept constant, Boyle's Law states that the volume of the gas must increase. Therefore, the combined effect of these two laws is that the temperature and volume of the gas both decrease.
**Explanation of Correct Answer (Option D):**
The correct answer to the question is option D, which states that both the temperature and volume of the gas decrease when it is cooled at constant pressure. This is because the cooling of the gas causes a decrease in temperature, which would normally result in a decrease in volume according to Charles's Law. However, since the pressure is kept constant, Boyle's Law states that the volume of the gas must increase. Therefore, the combined effect of these two laws is that the temperature and volume of the gas both decrease when it is cooled at constant pressure.
In summary, when a gas is cooled at constant pressure, both the temperature and volume of the gas decrease. This is due to the combined effect of Boyle's Law and Charles's Law.
When a gas is cooled at constant pressure, there are two factors that come into play: the temperature and the volume of the gas.
**Boyle's Law:**
According to Boyle's Law, the volume of a gas is inversely proportional to its temperature, assuming the pressure remains constant. This means that as the temperature of the gas decreases, its volume will increase.
**Charles's Law:**
According to Charles's Law, the volume of a gas is directly proportional to its temperature, assuming the pressure remains constant. This means that as the temperature of the gas decreases, its volume will decrease.
**Combined Effect:**
When a gas is cooled at constant pressure, both Boyle's Law and Charles's Law come into play. The cooling of the gas causes the temperature to decrease, which would normally result in a decrease in volume according to Charles's Law. However, since the pressure is kept constant, Boyle's Law states that the volume of the gas must increase. Therefore, the combined effect of these two laws is that the temperature and volume of the gas both decrease.
**Explanation of Correct Answer (Option D):**
The correct answer to the question is option D, which states that both the temperature and volume of the gas decrease when it is cooled at constant pressure. This is because the cooling of the gas causes a decrease in temperature, which would normally result in a decrease in volume according to Charles's Law. However, since the pressure is kept constant, Boyle's Law states that the volume of the gas must increase. Therefore, the combined effect of these two laws is that the temperature and volume of the gas both decrease when it is cooled at constant pressure.
In summary, when a gas is cooled at constant pressure, both the temperature and volume of the gas decrease. This is due to the combined effect of Boyle's Law and Charles's Law.
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When the gas is cooled at constant pressure,a)its temperature increase but volume decreasesb)its volume increases but temperature decreasesc)both temperature and volume increasesd)both temperature and volume decreasesCorrect answer is option 'D'. Can you explain this answer?
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