In a process a system does 238 J of work on its surrondings by absorbing 54 J heat. What is the change is internal energy of system during the operation ?

Options

A. 54 J
B. 222 J
C. `-184 J`
D. `-192 J`

Answer

C

Explanation

`Delta U= q + W `
Given q=54 j and W =- 238 j ( work done by a system or work done of the surroundings )
`therefore Delta U= 54 -238 =- 184 J `
Thus , the system loses its internal energy.