55 calculate w,q and Delta u when 0.75 mole of an ideal gas expands isothermally and reversibly at27C from volume of 15litres to 25 litres
![How come delta U is not equal to 0 in an isotherm expansion with a van der Waals gas but it is when an isotherm expansion (or compression, either way) is performed How come delta U is not equal to 0 in an isotherm expansion with a van der Waals gas but it is when an isotherm expansion (or compression, either way) is performed](https://i.redd.it/quehy8u37h241.jpg)
How come delta U is not equal to 0 in an isotherm expansion with a van der Waals gas but it is when an isotherm expansion (or compression, either way) is performed
![Calculate ΔS univ (in J/K) for the chemical reaction: C(graphite) + 2H2(g)→CH4(g);ΔH300^o = - 75.0kJ . The standard entropies of C(graphite),H2(g),CH4(g) are 6.0,130.6 and 186.2J/K - mol , respectively. Calculate ΔS univ (in J/K) for the chemical reaction: C(graphite) + 2H2(g)→CH4(g);ΔH300^o = - 75.0kJ . The standard entropies of C(graphite),H2(g),CH4(g) are 6.0,130.6 and 186.2J/K - mol , respectively.](https://haygot.s3.amazonaws.com/questions/1958983_1679486_ans_16e3b2dd9b004cd793887de2756ff04c.jpg)
Calculate ΔS univ (in J/K) for the chemical reaction: C(graphite) + 2H2(g)→CH4(g);ΔH300^o = - 75.0kJ . The standard entropies of C(graphite),H2(g),CH4(g) are 6.0,130.6 and 186.2J/K - mol , respectively.
![Calculate the value of Δ U for the following reaction: C2H4(g) + 3O2(g) → 2CO2(g) + 2H2O(l),Δ H = - 1410.0kJ Calculate the value of Δ U for the following reaction: C2H4(g) + 3O2(g) → 2CO2(g) + 2H2O(l),Δ H = - 1410.0kJ](https://haygot.s3.amazonaws.com/questions/1332992_1318043_ans_46f87439c5f74f48910c9d69c3600925.jpg)