2 Answers

Peter Stuifzand · Answer 1 · 2019-05-17T09:58:23+0000

The change in enthalpy refers to the amount of heat absorbed or heat evolved in a reaction which is carried out at constant pressure.

The change in enthalpy of a reaction is equal to the sum of formation of products minus sum of formation of reactants. It is denoted by
$\Delta H$ .

The given reaction is:

$Zn + Cs_(2)SO_(4) \rightarrow 2Cs + ZnSO_(4)$

$\Delta H = \Delta H_(f)^(0)(products))-\Delta H_(f)^(0)(reactants))$

Substitute the given values
$\Delta H_(f)^(0)$ (products) and
$\Delta H_(f)^(0)$ (reactants) in above formula, we get

$\Delta H = -1,063 kJ -(-1,400 kJ)$

=
+ 337 kJ

Thus, change in enthalpy for the single replacement reaction is

Please log in or register to add a comment.