Which of the following best describes the two features a reaction would need to be spontaneous at any temperature?

1) a catalyst and lower activation energy

2) a heat source and high activation energy

3) positive enthalpy and negative entropy changes

4) negative enthalpy and positive entropy changes

Question

Which of the following best describes the two features a reaction would need to be spontaneous at any temperature? 
	
1) 	a catalyst and lower activation energy
	
2) 	a heat source and high activation energy
	
3) 	positive enthalpy and negative entropy changes
	
4) 	negative enthalpy and positive entropy changes

aravindg · Answer

I think its 4 

Negative enthalpy means energy released and hence more stability. Positive entropy also gives stability.