Answered

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15) A closed, uninsulated system was fitted with a movable piston. The addition of 754.3 J of heat caused the system to expand, doing 424.5 J of work in the process against a constant pressure. What is the value of E for this process?

Sagot :

Given,

Addition of heat, Q=+754.3 J

Work done , W=-424.5 J

The work is done against constant pressure.

To find

The value of E for this process

Explanation

According to the first law of thermodynamics,

[tex]\Delta E=Q+W[/tex]

Putting the values,

[tex]\begin{gathered} \Delta E=754.3-424.5 \\ \Rightarrow\Delta E=329.8J \end{gathered}[/tex]

Conclusion

The required value is 329.8 J

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