Consider the reaction below. What is the limiting reactant when 1.30 g of ethene (C2H4, molar mass = 28.0 g/mol) and 16.0 g of oxygen (molar mass = 32.0 g/mol) are reacted?

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.

away from the curb

explanation:

the wheels would then hit the curb if it started to rolling, decreasing the chance of an accident.