Enthalpy change of a reaction with be equal to

Explanation

Out of the two numbers 53.2 has three significant digits. So `pi` should be written with 3+1 =4 significant figures.
`pi =3.1415= 3.142 ` (as 1 is odd it is raised by one).
Now `(3.142)/(53.2)= 0.0590601`
This is to be rounded off to three significant figures 0.059060 = 0.0591