A simple of gas present in a cylinder fitted with a frictionless piston expands against constant pressure of `1atm` from a volume fo `2L` to `12L`. During the process, it absorbs `600J` of heat from the surroundings. Calculate the change in internal energy of the system.

Explanation

To calculate the change in internal energy (ΔU) of the gas system, we will use the first law of thermodynamics, which states:

\[ \Delta U = Q + W \]

Where:
- \( \Delta U \) = change in internal energy
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