For the reaction, A® B +C, K is 0.729 at 20°C. Given that ΔH° = 45.9 kJ/mol, what is K value for this reaction at 377 K? ( )
A: 45.9
B: 191
C: 91.2
D: 66.6
E: 48.5
A: 45.9
B: 191
C: 91.2
D: 66.6
E: 48.5
E
举一反三
- 某一反应在298 K时,ΔrHmθ = 80 kJ/mol,ΔrGmθ =60 kJ/mol,则该反应的ΔrSmθ等于 ( ) J/(mol·K) A: -67 B: 20 C: 67 D: -20
- The values are assigned as j = k = 3. What will be the value of c = j *= k + 5 ? ________ A: 24 B: 20 C: 11 D: 8
- 298K和标准压力下2 mol双原子理想气体经过绝热可逆过程变到体积增加一倍,则终态温度及该过程的焓变分别为: A: T2= 226 K;ΔH=-2.10 kJ B: T2= 244 K;ΔH=-3.14 kJ C: T2= 226 K;ΔH=-4.19 kJ D: T2= 244 K;ΔH=-1.57 kJ
- 某化学反应若在300 K,100kPa下于试管中恒温恒压进行时放热60 kJ,在相同条件下通过可逆电池恒温恒压进行反应,则吸热6kJ,则该化学反应的焓变DH= ,熵变DS= A: -60 kJ; 20 J/K B: -60 kJ; 20 J/K C: -60 kJ; -200 J/K D: -6 kJ; 20 J/K E: 6 kJ; -200 J/K F: 6 kJ; 200 J/K
- The half-life formula of the first order reaction is A: t1/2 = 0.1054/k B: t1/2 = 0.693/k C: t1/2 = C0/2k D: t1/2 = 0.693k
内容
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某化学反应在300 K,101.325 kPa下进行,放热60 kJ。若在相同条件下通过可逆电池来完成,则吸热6 kJ,该化学反应的ΔS=( ) A: 15 KJ/mol B: 20J/K C: 25 J/mol D: 30 KJ/K
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下列单位中,不属于比热容的单位是: A: kJ/(kg•K) B: kJ/(kmol•K) C: kJ/K D: J/(kg•K)
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在301 K时鲜奶大约4.0 h变酸,但在278 K的冰箱中...反应活化能为 kJ/mol。
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某化学反应在300K、下于烧杯中进行,放热60 kJ·mol,若在相同条件下安排成可逆电池进行,吸热6 kJ·mol,反应在试管中进行时其环境的熵变为( )。 A: 200 J·K·mol B: -200 J·K·mol C: -180 J·K·mol D: 180 J·K·mol
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比热容的单位是: A: kJ B: kJ/K C: kJ/kg D: kJ/(kg·K)