At −12.6°C the concentration equilibrium constant Kc = 8.7 x 10^−5 for a certain reaction. Here are some facts about the reaction:

The initial rate of the reaction is 11. mol·L^−1s^−1
If the reaction is run at constant pressure, 85.0 kJ/mol of heat are absorbed.
If the reaction is run at constant pressure, the volume increases by 12.%
Using these facts, can you calculate Kc at −23°C?
If you said yes, then enter your answer at right. Round it to 2 significant digits.

If you said no, can you at least decide whether Kc at −23.°C will be bigger or smaller than Kc at −12.6°C?

Required:
Using these facts, can you calculate Kc at —23C?

What are the spectator ions in 2h+ + so42- + ca2+ + 2r → caso4 + 2h+ + 21?

7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation. 8. when a 2.5 mol of sugar (c12h22o11) are added to a certain amount of water the boiling point is raised by 1 celsius degree. if 2.5 mol of aluminum nitrate is added to the same amount of water, by how much will the boiling point be changed? show all calculations leading to your answer or use 3 – 4 sentences to explain your answer. 9. if 5.40 kcal of heat is added to 1.00 kg of water at 100⁰c, how much steam at 100⁰c is produced? show all calculations leading to an answer. 10. the freezing of water at 0⁰c can be represented as follows: h2o (l) ↔ h2o(s) the density of liquid water is 1.00 g/cm3. the density of ice is 0.92 g/cm3. in 3 – 4 sentences explain why applying pressure causes ice to melt.

Asample of air with a volume of 2.20m3 at a pressure of 105 kpa and a temperature of 30c is cooled to 10c and the pressure is reduced to 75.0 kpa. what is the new volume? 6.9 1.34 2.56 43.0 2.88