由下列数据确定压力为100 kPa 时液态汞的沸点是 已知: 物质 Hg(l) Hg(g) ΔfHmΘ / kJ·mol-1 0 60.84 SmΘ / J·mol-1·K-1 77.4 174.9
A: 273.6℃
B: 351℃
C: 624℃
D: 425.4℃
A: 273.6℃
B: 351℃
C: 624℃
D: 425.4℃
举一反三
- 由下列数据确定压力为100kPa时液态汞的沸点是已知:物质Hg(l)Hg(g)ΔfHmΘ/kJ·mol-1060.84SmΘ/J·mol-1·K-177.4174.9 A: 273.6℃ B: 351℃ C: 624℃ D: 425.4℃
- 在373 K和101.3 kPa时,水的汽化热为40.69 kJ·mol-1,则1 mol水气化时QP=________ kJ·mol-1 , ΔrHm = kJ·mol-1 , ΔrSm =_______ J·mol-1·K-1 , ΔrGm =_______ kJ·mol-1。以下哪个选项是正确答案? A: 40.69 kJ·mol-1 , 40.69 kJ·mol-1 , 109.09 J·mol-1·K-1 , 0 B: 37.59 kJ·mol-1 , 40.69 kJ·mol-1 , 109.09 J·mol-1·K-1 , 0 C: 40.69 kJ·mol-1 , 40.69 kJ·mol-1 , 109.09 J·mol-1·K-1 ,40.69 kJ·mol-1 D: 40.69 kJ·mol-1, 40.69 kJ·mol-1, 0, 0
- 已知反应B4C(s)()+4O2(g)()=2B2O3(s)()+CO2(g)的ΔrHmΘ=-2859()kJ·mol-1;而且ΔfHmΘ(B2O3)()=()-1273()kJ·mol-1;ΔfHmΘ(CO2)()=()-393()kJ·mol-1。则ΔfHmΘ(B4C)为()。A.()-()2859()kJ·mol()-()1B.()-()1666()kJ·mol()-()1C.()1666()kJ·mol()-()1D.()-()80.0()kJ·mol()-()1
- 已知在298.15 K时,N2(g)+3H2(g)→2NH3(g)反应热为ΔrHθ= -23.06 kJ·mol-1 (ΔfHmθ(NH3,g,298.15K)=-46.11kJ·mol-1),则该反应的ξ为 mol A: 1 B: 2 C: 1/2 D: 1/4
- 已知Smθ(H2O,l)=70.0J·mol-1·K-1,Smθ(H2)=130.7 J·mol-1·K-1,Smθ(O2)=205.2J·mol-1·K-1,计算298.15K时2H2O(l) =2H2(g)+ O2(g) 的ΔrSmθ= J·mol-1·K-1;