Question

2 moles of an ideal gas expanded isothermally and reversibly from 1 litre to 10 litres at 300 Kelvin . what is the enthalpy change ?

Answer 1

do u know how to start? u need an equation that has most of the givens

Answer 2

Yes .
According to the first law , U= Q+ W .
But , U=0 .
So , Q=W .
W= nRTln(Vf/Vi) .
That settles it , right?
Also , I am pretty confused with the signs , could you give me some advice on that too ?