A carnot engine absorbs 760 kJ heat from a source at 380 K. It rejects (I) 650 kJ, (II) 560 kJ of heat to sink at 280 K. State which of these represent a reversible and irreversible cycle.
The pressure-volume work for an ideal gas can be calculated by using the expression W=∫VfVipexdV. The work can also be calculated from the pV-plot by using the area under the curve within the specified limits. When an ideal gas is compressed (a) reversibly or (b) irreversibly from volume Vi to Vf. Choose the correct option. (a) W (reversible) = W (irreversible) (b) W (reversible) < W (irreversible) (c) W (reversible) = W (irreversible) (d) W (reversible) = W (irreversible) +pex.ΔV