A22.4-l sample of nitrogen at 3.65 atm and 22°c is simultaneously expanded to 57.4 l and heated to 38°c. what is the new pressure of the gas?

1.5 atm.

Explanation:

where, P is the pressure of the gas in atm.

V is the volume of the gas in L.

n is the no. of moles of the gas in mol.

R  is the general gas constant,

T is the temperature of the gas in K.

(P₁V₁T₂) = (P₂V₂T₁)

P₁ = 3.65 atm, V₁ = 22.4 L, T₁ = 22°C + 273 = 295 K,

P₂ = ??? atm, V₂ = 57.4 L, T₂ = 38°C + 273 = 311 K,

(P₁V₁T₂) = (P₂V₂T₁)

∴ P₂ = (P₁V₁T₂)/(V₂T₁) = (3.65 atm)(22.4 L)(311 K)/(57.4 atm)(295 L) = 1.5 atm.

what is the question?

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.