When 0.243 g of mg metal is combined with enough hcl to make 100 ml of solution in a constant-pressure calorimeter, the following reaction occurs:
mg(s) + 2 hcl(aq) → mgcl2(aq) + h2(g)

if the temperature of the solution increases from 23.0 ∘c to 34.1 ∘c as a result of this reaction, calculate δh in kj/mol of mg. assume that the solution has a specific heat of 4.18 j/g∘c.

when 0.243 of metal is combined with enough to make 100 of solution in a constant-pressure calorimeter, the following reaction occurs:

if the temperature of the solution increases from 23.0 to 34.1 as a result of this reaction, calculate in of . assume that the solution has a specific heat of 4.18 .

−19.1 kj/mol
−111 kj/mol
−191 kj/mol
−464 kj/mol
−961 kj/mol

i think that the answer is c

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.