Energy transferred due to force applied on the system.
| + W | : Work energy transferred into the system. |
| − W | : Work energy transferred out of the system into the surrounding. |
W = Fs cosθ
| F | : Force applied on the body |
| s | : Displacement of the body (Δx) |
| θ | : Angle between force vector and displacement vector |
Won = −Wby
| Won | : Work done on the gas (Compression) |
| Wby | : Work done by the gas (Expansion) |
W = − PΔV
| W | : Work done on the gas |
| P | : External pressure applied on the gas |
| V | : Volume of the gas |
| ΔV | : Vfinal − Vinitial |
For expansion: W is −ve ∵ ΔV > 0
For compression: W is +ve ∵ ΔV < 0
W = − ∫ P dV
Work done on Ideal Gas
W = − nRΔT ∵ PΔV = nRΔT
| n | : Number of moles of gas in a closed system |
| R | : Universal Gas Constant = 8.3145 J/mol·K OR 0.08205 L·atm/mol·K |
| T | : Temperature |