Question

In: Chemistry

please show work An industrial chemist introduces 2.0 atm of H2 and 2.0 atm of CO2...

please show work

An industrial chemist introduces 2.0 atm of H2 and 2.0 atm of CO2 into a 1.00−L container at 25.0°C and then raises the temperature to 700°C, at which Kc = 0.534:

H2(g) + CO2(g) ⇌ H2O (g) + CO(g)

How many grams of H2 are present at equilibrium?

Solutions

Expert Solution

We need to apply multiple concepts here.

Increasing the temperature from 25oC (298 K) to 700oC (973 K) will increase the pressure of each reactant gases :

Let x be the change in pressure of reactants when they reach equilibrium.

P(H2) = 6.53 - x
P(CO2) = 6.53 - x
P(H2O) = x
P(CO) = x

Hence, equilibrium expression is given by:

Solving for X, we get X = 2.76 atm

Therefore, Pressure of H2 at equilibrium =  6.53 - 2.76 = 3.77 atm

From ideal gas equation, no.of moles of H2 is given by:

Therefore, Mass of H2 at equilibrium = (0.0472 mol) x( 2 g/mol) = 0.0944 g of H2

  • Mass of H2 at equilibrium = 0.0944 g

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