已知298K下ΔfHmΘ(CH3OH,l)=-238.66kJ·mol-1,ΔfHmΘ(CH3OH,g)=-200.66kJ·mol-1,则在同一温度下甲醇的标准摩尔气化焓ΔvapHmΘ(CH3OH)=()
A: -38.00kJ·mol-1
B: 38.00kJ·mol-1
C: 19.00kJ·mol-1
D: -19.00kJ·mol-1
A: -38.00kJ·mol-1
B: 38.00kJ·mol-1
C: 19.00kJ·mol-1
D: -19.00kJ·mol-1
举一反三
- 已知298K下ΔfHmΘ(CH3OH,l)=-238.66kJ·mol-1,ΔfHmΘ(CH3OH,g)=-200.66kJ·mol-1,则在同一温度下甲醇的标准摩尔气化焓ΔvapHmΘ(CH3OH)=() A: -38.00kJ·mol B: 38.00kJ·mol C: 19.00kJ·mol D: -19.00kJ·mol
- 已知298K下ΔfHmΘ(CH3OH,l)=-238.66kJ·mol-1,ΔfHmΘ(CH3OH,g)=-200.66kJ·mol-1,则在同一温度下甲醇的标准摩尔气化焓ΔvapHmΘ(CH3OH)=() A: -38.00kJ·mol-1 B: 38.00kJ·mol-1 C: 19.00kJ·mol-1 D: -19.00kJ·mol-1
- 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
- (水的相变焓的关系)水的三相点附近,其蒸发热和熔化热分别为 44.8 kJ·mol-1和 5.99 kJ·mol-1。则在三相点附近冰的升华热约为____。 A: 38.8 kJ·mol -1 B: 50.8 kJ·mol -1 C: - 38.8 kJ·mol -1 D: - 50.8 kJ·mol -1
- 在298K时,2N2(g)+O2(g)=2N2O(g),其DrUym=166.5 KJ × mol-1 ,则该反应的标准摩尔反应焓变() A. 164 KJ / mol B. 328 KJ/molC. 146 KJ × mol-1 D. 82 KJ × mol-1 A: 164KJ/mol B: 328KJ/mol C: 146KJ/mol D: 82KJ/mol