Asystem gains 1500 j of heat, while the internal energy of the system increases by 4500 j and the volume decreases by . assume that the pressure is constant and find its value.

Hence the pressure is

Explanation:

Given data

Q=1500 J   system gains heat

ΔV=- 0.010 m^3     there is a decrease in volume

ΔU= 4500 J        internal energy decrease

We know work done is

W= Q- ΔU

=1500-4500= -3000 J

The change in the volume at constant pressure is

ΔV= W/P

there fore P = W/ΔV= -3000/-0.01= 3×10^5

Hence the pressure is

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