Five hundred kilograms per hour of steam drives a turbine. the steam enters the turbine at 5700 kpa and 650 0 c at a linear velocity of 60 m s-1 and leaves at a point 5 m below the turbine inlet at 4200 kpa, 450 0 c and a velocity of 360 m s-1 . the rate of entropy generation is 90 j k-1 s -1 , entropy of the flow stream is - 45 j k-1 s -1 , and temperature of the surroundings is 200 k. calculate the shaft work generated. (assume a steady state)

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.

i think its 100

i hope this !

one negative thing it that it can kill water animals. another negative thing is it can cause the destruction of ecosystem. one way water pollution can be reduced is to conserve energy.