1. Tardigrade
  2. Question
  3. Chemistry
  4. During compression of a spring the work done is 10 kJ and 2 kJ escaped to the surroundings as heat. The change in internal energy, Δ U(in kJ) is:

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Q. During compression of a spring the work done is $10\,kJ$ and $2\,kJ$ escaped to the surroundings as heat. The change in internal energy, $\Delta\, U(in\,kJ)$ is:

JEE MainJEE Main 2019Thermodynamics

Solution:

$\Delta U = q + w$
$q = - 2\,kJ, W = 10\,kJ$
$\Delta U = 8\,kJ$