Having accurate  Specific date can give scientist what they need for more reliabliltiy.
        
                    
             
        
        
        
Under acidic conditions, the solution is red, and under alkaline conditions, the solution is blue. Chemical reactions other than acid-base can also cause a color change to litmus paper. For instance, chlorine gas turns blue litmus paper white – the litmus dye is bleached, because of presence of hypochlorite ions.
 
        
             
        
        
        
Mutation. Called this because the other possible answers do not equal a copying error, mutations affect the outcome. 
        
             
        
        
        
Since the enthalpy can be calculated from the heat of formation, the enthalpy is  136 kJ/mol.
<h3>What is enthalpy?</h3>
The enthalpy of a reaction is the heat that is lost or gained in that reaction. We know that the enthalpy can be calculated from the heat of  formation.
Thus, we can obtain the enthalpy of the reaction as 4 * 34 kJ/mol = 136 kJ/mol.
Learn more about enthalpy:brainly.com/question/13996238
#SPJ1