2. Scrie formulele structurale pentru izoalcanii: 3-etil-2,2 dimetilpentan 5-etil-2-metilheptan 2,2,3,3-tetrametilbutan 3,3-dimetiloctan 2,2,4-trimetilpentan CH3 | CH3 – C – CH – CH2 – CH3 | | CH3 CH2 – CH3

lithosphere and asthenosphere

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.

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.