1 points| Previous Answers arm-up questions (no points but no penalty): . The \"

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1 points| Previous Answers arm-up questions (no points but no penalty): . The "change in thermal energy" of a system is represented as AEth B. Heat transfer is represented as Q C. If heat transfer is into a system, the quantity of heat transfer will be: positive D. If heat transfer is out of a system, the quantity of heat transfer will be: negative due to that heat transfer. E. The "Q" in the first law of thermodynamics represents the sum of the the heat transfer in The actual problem: A system of gas undergoes the following set of thermodynamic processes: 2.83 x 106 J of heat transfer into the system. 4.50 × 105 J of work as the gas is compressed. 5.87 × 106 J of heat transfer out of the system. What is the change in thermal energy of the system due to these processes? (8250000 ) Pay careful attention to the sign convention for heat and work. J

Explanation / Answer

Ans: The heat energy gained by system = +2.83E6 J

The energy gained by system due to compression = +4.50E5 J

The energy lost by the system = -5.87E6 J (Note negative sign indicates loss)

So, The change in thermal energy of the system is 2.83E6+4.50E5-5.87E6= -2.59E6=-2590000 J

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