1. Tardigrade
  2. Question
  3. Chemistry
  4. A gas is allowed to expand in a well insulated container against a constant external pressure of 2.5 atm from an initial volume of 2.50 L to a final volume of 4.50 L. The change in internal energy Δ U of the gas in joules will be

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. A gas is allowed to expand in a well insulated container against a constant external pressure of 2.5 atm from an initial volume of 2.50 L to a final volume of 4.50 L. The change in internal energy $\Delta U$ of the gas in joules will be

NTA AbhyasNTA Abhyas 2022

Solution:

As q = 0 so using I law of Thermodynamics.
$\Delta U=-p.\Delta V$
$=-2.5\left(\right.4.5-2.5\left.\right)=-5$ lit atm
$=-5\times 101.3=-506.5$ Joule
$=-505$ J