A container is filled with a mixture of gases:

O2, which has a pressure of 1.0 atm.
N2, which has a pressure of 0.75 atm,
And Cl2 at some unknown pressure.
If the total pressure in the container is 3.30 atm, what is the pressure of Cl2?

The partial pressure of chlorine gas in the mixture is 1.55 atm.

Explanation:

Partial pressure of oxygen gas =

Partial pressure of nitrogen gas =

Partial pressure of chlorine gas =

Total pressure of the mixture of gases = P = 3.30 atm

Using Dalton's law of partial pressure:

The partial pressure of chlorine gas in the mixture is 1.55 atm.

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.