What happens to pressure if the temperature is constant?
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Solution
When the temperature remains constant, the pressure of a gas is in inverse proportion to its volume. This is known as Boyle's Law or Mariotte's Law.
According to Boyle's Law,
Where, P is pressure, V is volume and T is temperature.
Thus, if the volume increases, the pressure will decrease.
A constant Temperature process is called an Isothermal process. It is a thermodynamic process in which temperature remains constant and change in temperature becomes zero ().
The P-V graph at a constant temperature is shown below.