6.52 the molar enthalpy of a binary liquid mixture of species 1 and 2 is given by:
h = x1 (275 + 75t) + x2(125 + 50t) + 750x1x2[j / mol]
where t is the temperature in [k]
(a) what is the enthalpy of mixing, \deltahmix in [j], of a mixture with 2 mol of 1 and 3 mol of 2 at 20°c?
(b) consider the adiabatic mixing of a stream of pure 1 flowing at 2 mol/s with a stream of pure 2 flowing at 3 mol/s. both inlet streams are at 20°c. what is the exit temperature of the mixture?
koretsky, milo d.. engineering and chemical thermodynamics, 2nd edition (page 384). wiley higher ed. kindle edition.

kuchisake

kuchisake-onna (口裂け女, "slit mouth woman ") is a malevolent figure appearing in japanese ghost stories, possibly dating back to the edo period. she takes the form of a masked woman who approaches people and asks them if they believe she is pretty.

explanation:

i think it is d. e because the next one is igneous.

the answer is minerals.

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.