(D) According to the first law of thermodynamics,the change in internal energy ($\Delta U$ or $\Delta E$) is given by the equation: $\Delta U = q + w$

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(D) According to the first law of thermodynamics,the change in internal energy ($\Delta U$ or $\Delta E$) is given by the equation: $\Delta U = q + w$. Here,the system gains heat,so $q = +x \ J$. Work is done on the system,so $w = +y \ J$. Therefore,$\Delta U = (+x) + (+y) = x + y \ J$.

Class 11 Chemistry Thermodynamics First law of thermodynamics

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What is the change in internal energy if a system gains $x \ J$ of heat and $y \ J$ of work is done on it?

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A
$x-y$
B
$-x+y$
C
$-x-y$
D
$x+y$

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What is the change in internal energy if a system gains $x \ J$ of heat and $y \ J$ of work is done on it?

Similar Questions

Which of the following statements regarding the first law of thermodynamics is correct?

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