3kg/s of a salt solution is concentrated from 10% to 55% solid in a backward feed double effect evaporator using steam at 393 k, and a vacuum such that the bubble point in the second effect is 325 k the feed is initially at 297 k and each effect is identical additional information 1 cpis taken to be 4 18 kj/kg k 2 boiling point rise can be neglected 3 the overall heat transfer coefficients are as follows first effect= 25 kw/m²k second effect= 20 kw/m²k since the feed enters as a cold stream, the first effect requires more heat than the second effect at, must be increased and at2 must be decreased proportionately in this case, assume at, is increased by 2 degrees k and at, is decreased by 2 degrees k 51 draw the flowsheet for this process and define the applicable operating conditions for each effect 52 calculate the flowrate of the product steam and the amount of liquor evaporated? 53 calculate the steam consumption required?

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.

explanation:

two years ago, when picking flowers in the mountains back of yosemite valley, i found a book. it was blotted and storm-beaten; all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however; many of the inner pages were well preserved. and although all were more or less stained and torn, whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today; its granite pages have been torn and blurred by the same storms that wasted the castaway book.

two years ago, when picking flowers in the mountains back of yosemite valley; i found a book. it was blotted and storm-beaten, all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however, many of the inner pages were well preserved. and although all were more or less stained and torn; whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today, its granite pages have been torn and blurred by the same storms that wasted the castaway book.

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.