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.`