... per cycle and delivered −Q0lheat to the cold one per cycle, where W = Q0l+ Q0h and ηc=WQ0h=1−τlτh. (2. 262 )According to Clausius principleQl+ Q0l≤ 0 , (2. 263 )thusγ ... τl. (2. 264 )21. Using Eq. (2. 264 )A (τh− τl)P=τlτh− τl, (2. 265 )thusτ2l− 2τlµτh+P2A¶+ τ2h=0, (2. 266 )orτl= τh+P2A±sµτh+P2A¶2− τ2h. (2. 267 )The ... Zint− 1¶. (2.182)(2.183)Eyal Buks Thermodynam ics and Statistical Physics 80Chapter 2. Ideal Gas4. Using Eqs. (1.87), (1.70) and (1.71), and noting that∂∂τ= −1τ2∂∂β, (2.189)one finds...