A reaction has ΔH positive and ΔS positive. When is it spontaneous?
AAt low temperature only
BAt no temperature
CAt all temperatures
DAt high temperature
Answer & Solution
Correct answer: D. At high temperature
The TΔS term must outweigh the positive ΔH, which happens at high temperature.
Keep practising Thermodynamics
Browse all Thermodynamics questions for CBSE Class 11 (Science), or explore more Chemistry topics.
Related questions
What does the first law say about the direction of heat flow?Strongly exothermic reactions generally have an equilibrium constant that is what?What is the Gibbs energy of a system at chemical equilibrium?A reaction has ΔH = -80 kJ and ΔS = -100 J/K at 300 K. What is ΔG?For 2Cl(g) → Cl2(g), what are the signs of ΔH and ΔS?In ΔG = ΔH - TΔS, what does TΔS represent?What is another name for the Gibbs energy of a reaction?A process is spontaneous when ΔG has what sign?