This is Raoult law & vapor pressure problem: high school

2.7 moles of Tang are added to a pitcher containing 3.28 liters of H2O at a temperature of 25°C. The vapor pressure of water alone is 23.8 mm Hg at 25o C. What is the new vapor pressure of the Tang solution?

Explanation:

As per Rault's law, when a solute is dissolved, the vapor pressure of the solution is equal to the product of the mole fraction of the solvent and  the vapor pressure of the pure solvent.

1. Calculate the mole fraction of solvent

a) Moles fo solvent

The solven is water

b) Moles of solute

The solute is tang:

c) Mole fraction of solvent:

2. Vapor pressure of the solution

answer; (d) constructive and destructive force;

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.