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Question
As the temperature increases, average kinetic energy of molecules increases. What would be the effect of increase of temperature on pressure provided the volume is constant?
Options
Increases
Decreases
Remains same
Becomes half
Solution
Increases
Explanation:
Gay Lussac’s law shows the direct relationship between the pressure and the temperature of a fixed amount of gas at constant volume.
Gay Lussac's law states that at constant volume, the pressure of a fixed amount of a gas is directly proportional to the temperature.
Therefore, `P oo T` ………..at constant volume
Thus, pressure increases if the temperature is increased at a constant volume.
To elaborate more on this topic, we will see a real-life example.
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RELATED QUESTIONS
Match the graphs between the following variables with their names:
| Graphs | Names | ||
| (i) | Pressure vs temperature graph at constant molar volume. | (a) | Isotherms |
| (ii) | Pressure vs volume graph at constant temperature. | (b) | Constant temperature curve |
| (iii) | Volume vs temperature graph at constant pressure. | (c) | Isochores |
| (d) | Isobars |
Assertion (A): The temperature at which vapour pressure of a liquid is equal to the external pressure is called boiling temperature.
Reason (R): At high altitude atmospheric pressure is high.
The volume of certain amount of an ideal gas is constant at STP. Which of the following changes is CORRECT at constant volume for the same amount of gas?
