Question

Determine the work done by a gas as it changes volume and pressure at a given temperature, and what happens to its internal energy. Calculate the ideal heat engine efficiency operating between two temperatures. Evaluate whether a claim of mechanical work corresponds to an ideal, real, of fictional heat engine (and thus cannot exist). Please give an example of each

Answer 1

Solution in the uploaded images

Date Page When the temperature of the system remain same then the process undergaing inside the system is called isothermal processes. The relation belween pressure and volume is pu- constant ho • PIV = PU where, P = pressure, U= Volume. work done in an į so thermal process is givenby. TW= 2.30 31 RT lag ( 32 ) Where on. Tw=2-303&IRT lag (P IL where, n=nood moles. R= gas constant T= Temperat wie Internal energy depends upon the temperature of the system. Since for isothurnal processes Change in demperature is zero konce

Poce change in internal energy systemet is zero. S for on isolated Jau= 0.=nRAT For the heat engine Tempura ure: a operating at two T> Tz va →w=a-ch, El Efficieny = work done y loo Feate atracted = Qi-Q2 x 100 Q, =/1 Q2xlo ~ =(1-) x 100 - or I h - -LI- T2 x 100 1 - IL For ideal system heat rejected to sink will be zero, qe d o W =& n = 1-ar-lie looy. which is not possible, Hence it does not exist