A. Predict if entropy would increase or decrease during the following phase changes. (2 points)

i. H2O(g) H2O(l) (1 point)

ii. H2O(s) H2O(l) (1 point)

b. Predict whether the entropy would increase or decrease in the reaction KCl(s) K+(aq) + Cl–(aq). Explain your answer. (2 points)

calculate how many grams of ammonia can be produced from 4.21 grams of

n2 + 3h2 = 2nh3

my answer:

25.0g n2 x (1 mol/ 28.0gn2) x (2 mol nh3/ 1 mol n2) x (17.0g nh3/ 1 molnh3) = 30.36g n2

25.0g h2 x (1 mol h2/ 2.00g h2) x (2 mol nh3/ 3 mol h2) x (17.0g nh3/ 1 mol nh3) = 141.67g h2

lr = n2

un recipient conține 6,4 moli de gaz. gazul hidrogen reprezintă 25% din totalul kilometrilor din container. în cazul în care presiunea totală este de 1.24 atm ceea ce este