Question

Predict how the total pressure varies during the gas-phase reaction 2 icl(g) +h2(g)i2(g)+2 hcl(g) in a constant-volume container

Answer 1

Answer:

1) Avogadro law states that equal no of moles of gas occupy equal volume.

2) Since the number of moles on both the sides of reaction are equal, the number of particles that are colliding with wall due to which pressure comes into picture.

3) So if the number of moles are equal then we can say pressure will also remain same.

Initial number of moles $n_{i} =nN_{2} +nH_{2}$ with no ammonia present.

At an arbitrary instant in the reaction α is the fraction of N2 that has reacted.

so the total number of gas moles is get by

n=[n$N_{2}$(1-α)]+[ n$H_{2}$-3αn$N_{2}$]+2αn$N_{2}$

The first two terms being the change in number of moles of reactant and the last one being the number of ammonia produced.