In which of the following equilibrium systems will an increase in the volume cause the equilibrium to shift away from the reactants and towards the products?

- H2(g) + F2(g) ⇌ 2HF(g)
- N2(g) + 3H2(g) ⇌ 2NH3(g)
- CaCO3(g) ⇌ CaO(s) + CO2(g)
- 2NOBr(g) ⇌ 2NO(g) + Br2(g)

2NOBr(g) ⇌ 2NO(g) + Br2(g)

Explanation: For volume changes in equillibrium, the following are to be taken into consideration:

2NOBr(g) ⇌ 2NO(g) + Br2(g) is the equillibrium system because there are more moles of products,therefore an increase in the volume of the reaction will shift to the right and produce more moles of products. Also both reactants and products exist in the gaseous state and does not have equal number of moles.

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

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a electronegativity decreases beacuse the size of nucleus is bigger.