Areaction vessel is charged with hydrogen iodide, which partially decomposes to molecular hydrogen and iodine: 2hi (g) h2(g) + i2(g) when the system comes to equilibrium at 425 °c, phi = 0.708 atm, and ph2 = pi2 the value of kp at this temperature is

The value of the equilibrium constant:

Explanation:

Given reaction: 2HI (g) ⇌ H₂(g) + I₂(g)

Number of moles of- HI: n₁ = 2 mole; H₂: n₂ = 1 mole; I₂: n₃ = 1 mole

Total number of moles: n = n₁ + n₂ + n₃ = 2 + 1 + 1 = 4 moles

The equilibrium constant for the given reaction is given as:

Given: Temperature: T = 425 °C = 425 + 273 = 698 K

The partial pressure: pHI = 0.708 atm,

and, pH₂ = pI₂

∵ partial pressure of a given gas: pₐ = Χₐ . P

Here, P is the total pressure

Χₐ is the mole fraction of given gas and is given by the equation

Mole fraction for HI:

Mole fraction for H₂:

Mole fraction for I₂:

Thus, Χ₂ = Χ₃ = 0.25

The partial pressure of HI is given by;

pHI = Χ₁ P

0.708 atm = 0.5 × P

⇒ P = 1.416 atm

As the partial pressures: pH₂ = pI₂

∴ pH₂ = pI₂ = Χ₂ P = Χ₃ P = 0.25 × 1.416 atm = 0.354 atm

Therefore, the value of Kp can be calculated as:

Therefore, the value of the equilibrium constant:

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.