predict whether δssystem is + (favorable) or - (unfavorable) for each of the following:
a. water vapor condensing
b. dissolving sugar in tea
c. 2pbo2(s) → 2pbo(s) + o2(g)
d. 2nh3(g) → n2(g) + 3h2(g)
e. ag+(aq) + cl-(aq) → agcl(s)
provide an explanation, as well, you!

1. suppose a reaction mixture, when diluted with water, afforded 300 ml of an aqueous solution of 30 g of the reaction product malononitrile [ch2(cn)2], which is to be isolated by extraction with ether. the solubility of malononitrile in ether at room temperature is 20.0 g/100 ml, and in water is 13.3 g/100 ml. what weight of malononitrile would be recovered by extraction with (a) three 100-ml portions of ether and (b) one 300-ml portion of ether? suggestion: for each extraction, let x equal the weight extracted into the ether layer. in part (a), the concentration in the ether layer is x/100 and in the water layer is (30 x)/300; the ratio of these quantities is equal to k 20/13.3.

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure

What happens to the average kinetic energy of a gas when the particles of the gas collide against each other at a constant temperature and volume? explain your answer.