Answer to Question #285974 in Physical Chemistry for Fatoma Alameen

Question

 A gas expands and does P-V work on the surroundings equal to 325 J. At the same time, it absorbs 127 J of heat from the surroundings. Calculate the change in energy of the gas?.

Answer 1

According to the first law of Thermodynamics

$\Delta\>u=q+w$

$=127-325$

$=-198J$