When a 4.2 gram sample of mercury (Il) oxide, HgO is decomposed into its elements by •
1 answer:
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Answer:
Kj/mol
Its an endothermic reaction
Explanation:
Enthalpy can be evaluated by using following formula -
where
q is the enthalpy or change in internal energy
m is the mass in kg
c is the specific heat
and is the change in temperature
Mass of HCl is equal to g/mol
or
Mass of HCl is equal to Kg/mol
Substituting the given values in above equation, we get-
Kj/mol
Enthalpy is positive thus it is an endothermic reaction