Question

What happens to pressure if the temperature is constant?

Answer 1

1. 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.
2. According to Boyle's Law,
   $\mathrm{P}\mathrm{\alpha }\frac{1}{\mathrm{V}}(\mathrm{T}\mathrm{constant})$
   $\mathrm{PV}=\mathrm{Constant}$
3. Where, P is pressure, V is volume and T is temperature.
4. Thus, if the volume increases, the pressure will decrease.
5. 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 ($∆\mathrm{T}=0$).
6. The P-V graph at a constant temperature is shown below.