Answer : The temperature in kelvins is, 
Explanation : Given,
 = 178.5 KJ/mole = 178500 J/mole
 = 178.5 KJ/mole = 178500 J/mole
 = 161.0 J/mole.K
 = 161.0 J/mole.K
Gibbs–Helmholtz equation is :

As per question the reaction is spontaneous that means the value of  is negative or we can say that the value of
 is negative or we can say that the value of  is less than zero.
 is less than zero.

The above expression will be:



Now put all the given values in this expression, we get :


Therefore, the temperature in kelvins is, 
 
        
             
        
        
        
Explanation:  
Z = atomic mass of the element and  , A = atomic mass of the element .
 a) Z = 11, A =  23
Element = Sodium
   symbol: ²³₁₁Na  .
b) Z = 28, A =  64
Element = Nickel
   symbol: ⁶⁴₂₈Ni  .
c) Z = 50, A = 115
Element = tin
   symbol: ¹¹⁵₅₀Sn  .
d) Z = 20, A = 42
Element = Calcium 
   symbol: ⁴²₂₀Ca .
 
        
                    
             
        
        
        
Answer is: key
design change for HFC-134a A/C systems versus CFC-12 A/C systems was quick
couple service fitting and that design reduce venting and mixing of
refrigerants during service.
<span>
Level of contamination is also reduced
and the emission of refrigerants and greenhouse gases (sulfur
dioxide, carbon dioxide) is also reduced.</span>
 
        
        
        
The halogens are five non-metallic elements found in group 17 of the periodic table. The term "halogen" means "salt-former" and compounds containing halogens are called "salts". All halogens have 7 electrons in their outer shells, giving them an oxidation number of -1.