an electric heater of 100 w 1w 1 js operates, Chemistry

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an electric heater of 100 w 1w 1 js operates

An electric heater of 100 W (1W = 1 J/s) operates for nine minutes to heat the gas in a cylinder, the gas expands. At the same time from five litres to eleven Litres against a constant atmospheric pressure of 3.766 atm determine the change in internal energy of the gas express your Answer in units of kJ?

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