If a process is both endothermic and spontaneous, which of following is true?
A: ΔS >0
B: ΔS <0
C: ΔH <0
D: ΔG >0
A: ΔS >0
B: ΔS <0
C: ΔH <0
D: ΔG >0
举一反三
- If a process is both endothermic and spontaneous, which of following is true? A: ΔS >0 B: ΔS <0 C: ΔH <0 D: ΔG >0
- 反应在任何温度下都不能正向自发进行的条件是: A: ΔH < 0,ΔS < 0 B: ΔH > 0,ΔS < 0 C: ΔH > 0,ΔS > 0 D: ΔH < 0,ΔS > 0
- 反应 2HI(g) = H2(g) + I2(s)在25 ℃时是自发的,其逆反应在高温下变为自发,由此可知其正反应的ΔH、ΔS为( ) A: ΔH > 0和ΔS < 0 B: ΔH < 0和ΔS < 0 C: ΔH > 0和ΔS > 0 D: ΔH < 0和ΔS > 0
- 理想气体向真空膨胀时,下列答案哪一个正确<br/>(<br/>) A: ΔU = 0,ΔS = 0,ΔG = 0 B: ΔU > 0,ΔS > 0,ΔG > 0 C: ΔU < 0,ΔS < 0,ΔG < 0 D: ΔU = 0,ΔS > 0,ΔG < 0
- 恒温恒压下,理想溶液混合前后,ΔS和ΔG的变化规律是 A: ΔS = 0,ΔG = 0 B: ΔS < 0,ΔG < 0 C: ΔS > 0,ΔG > 0 D: ΔS > 0,ΔG < 0