Aliquid takes 10.14 x 10^6 j of energy to boil 28.47 kg at 298 k. using the lanten heats of vaporization of 5 liquids below, determine what the substance is: acetone: 538,900 j kg-1ammonia: 1,371,000 j kg-1propane: 356, 000 j kg-1methane: 480, 600 j kg-1ethanol: 841,000 j kg-1a) ethanolb) ammoniac) propaned) acetone

Correct C) Propane

Latent heat of vaporization is the amount of heat required to bring about the phase transition from liquid to gaseous state, at its boiling point.

Given mass of the liquid = 28.47 kg

Heat required to boil the liquid =

The latent heat of vaporization of the liquid =

Latent heat of the liquid is close to that of propane (356000 J/kg).

So, the given liquid is propane.

answer: the enthalpy of the overall chemical reaction is +87.88 kj or +88 kj.

according to hess's law, the overall enthalpy of a reaction is the difference between the sum of enthalpy values of all the products and the sum of enthalpy values of all the reactants.

δh(reaction) = ∑nδh(products) - ∑nδh(reactants)

δh(reaction) = [δh +δh] - [δh]

δh(reaction) = [1(-287.02) + 1(0) ] - [1(-374.9)] kj = +87.88 kj

here, δh (pcl3) = -287.02 kj, δh(cl2) = 0, δh(pcl5) = -374.9 kj

therefore, enthalpy of the overall reaction is +87.88 kj or +88 kj.