Consider the following reaction: N2(g) + 3H2(g) ↔ 2NH3(g) ΔH = - 92.4 kJmol -1

a) The absolute entropy values, S, at 238 K for N2(g), H2(g) and NH3(g) are 192, 131 and 193 J K -1mol -1respectively. Calculate ∆Sº for the reaction and explain the sign of ∆Sº.

b) Calculate ∆Gº for the reaction at 238 K. State and explain whether the reaction is thermodynamically favored.

In a laboratory experiment, a fermenting aqueous solution of glucose and yeast produces carbon dioxide gas and ethanol. the solution was heated by burning natural gas in a bunsen burner to distill the ethanol that formed in the flask. during the distillation, the ethanol evaporated and then condensed in the receiving flask. the flame of the burner was kept too close to the bottom of the flask and some of the glucose decomposed into a black carbon deposit on the inside of the flask. during this experiment the following changes occurred. which of these changes involved a physical change and not a chemical change? check all that apply. 1-condensation of ethanol 2-evaporation of ethanol 3- formation of carbon dioxide gas from glucose burning of natural gas 4-formation of ethanol from glucose by yeast 5-formation of a carbon deposit inside the flask

Agas in a balloon at constant pressure has a volume of 160 ml at -125*c. what is its volume at 29.0*c?

Which of the following elements would you expect to have the lowest ionization energy value? fluorine, lithium, neon, nitrogen