What is the value of h?

h=53

Explanation:
A straight line has an angle degree of 180. To find out h, we would subtract 127 from 180.

180-127=53

I hope this helps!

So  if  the sum of the enthalpies of the reactants is greater than the products, the  reaction  will be  exothermic.  if  the products side has a larger enthalpy, the  reaction  is  endothermic. you may wonder why  endothermic reactions, which soak up energy or enthalpy from the environment, even happen