Consider the equilibrium: Predict what will occur when the equilibrium is upset
ID: 815822 • Letter: C
Question
Consider the equilibrium:
Predict what will occur when the equilibrium is upset by decreasing the temperature
Select one:
a. Reaction will occur in the reverse direction (to the left).
b. No net change will occur, either in the forward or reverse direction.
c. Reaction will occur in the forward direction (to the right).
Consider the equilibrium: Predict what will occur when the equilibrium is upset by decreasing the temperature Select one: a. Reaction will occur in the reverse direction (to the left). b. No net change will occur, either in the forward or reverse direction. c. Reaction will occur in the forward direction (to the right).Explanation / Answer
NO + Cl2 ---> NOCl2 ; H= +21 kJ
We are interested now in the sign of H
Since it is possitive, this means Hfinal - Hinitial > 0
or H final > H initial
this means that the enthalpy of the system increase and that the system "absorbed" from the enviroment!
This is an ENDOTHERMIC reaction, whe you add heat, the system will react if you take out heat, the system will form products
NOW; if you decrease temeprature, you will decrease heat in the system which means that you are "taking" heat of the system
this means the system will tend to form products to increase the temperature of the same system
the answer is
c. Reaction will occur in the forward direction (to the right).