Which exerts greater pressure on the floor—standing flat-footed or standing on tiptoe? on tiptoe, because the force acts over less area on tiptoe, because the force acts over more area flat-footed, because the force acts over more area flat-footed, because the force acts over less area

The correct statement is on tiptoe, because the force acts over less area.

Explanation:

The pressure is illustrated as force per unit area. The pressure is determined in Pascal, that is, Newton per square meter. In case when one is standing on the tiptoe, then force imparted by the body stays the same, however, it now gets concentrated in a confined region. The pressure is determined by force divided by area. Thus, by minimizing the area, the pressure gets increased.

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.

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