Two liters of oxygen (O2) is collected over water at 20oC. If the total pressure in the container is 95.00 kPa, what is the partial pressure of the oxygen gas?

A) 92.00 kPa
B) 92.67 kPa
C) 95.00 kPa
D) 97.33 kPa

Temperature (oC) Vapor pressure (kPa)
0 0.61
20 2.33
60 19.92
100 101.3

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.

the temperature of the gas, in k, not celsius.