Consider the following exergenic reaction:

2NO2 (gas) →N2O4 (gas)

At constant pressure, which of the following statements is true?
1)
The reaction is never spontaneous.

2)
The reaction is only spontaneous at temperatures below 10K but not at higher temperatures.

3)
The reaction is always spontaneous.

4)
The reaction is only spontaneous in the presence of enzymes.

Question

Consider the following exergenic reaction:

2NO2 (gas) →N2O4 (gas)

At constant pressure, which of the following statements is true? 
1) 	
The reaction is never spontaneous.

	
2) 	
The reaction is only spontaneous at temperatures below 10K but not at higher temperatures.

	
3) 	
The reaction is always spontaneous.

	
4) 	
The reaction is only spontaneous in the presence of enzymes.