【简答题】已知 298K时 n-C 4 H 10 (g) C 4 H 6 (g) Δ f G m Θ / kJ · mol -1 -15.7 152.1 则反应 C 4 H 10 (g)=C 4 H 6 (g)+2H 2 (g)在298K和101.3kPa下的ΔrG m Θ =____ kJ·mol -1
【单选题】听力原文:W: Why are the children so noisy? M: They want something for a snack. W: Don't give them anything. They're going to have dinner soon. What is the man going to give the children?
【单选题】听力原文:W: Oh, where are we going? M: I want to show you something. W: I know, but what is it? M: A farm. It's just down this road. It's a small place, but at least it would be our own, W: A farm? How ca...