Question 1
A mixture, containing 0.0750 M HCl(g) and 0.0330 M O
2(g) is allowed to come to equilibrium at 480 °C.
4 HCl(g) + O
2(g)
2 Cl
2(g) + 2 H
2O(g)
At equilibrium [Cl
2] = 0.030 M. What is the value of
Kc?
◦ 1.1 × 10
-3 ◦ 890
◦ 0.13
◦ 1.3
◦ 480
Question 2
According to Le Chatelier's Principle:
◦ an increase in pressure always causes a change in the position of equilibrium for any reaction
◦ the greatest yield of ammonia in the exothermic reaction N
2 + 3 H
2 2 NH
3 is attained at a high temperature
◦ the equilibrium constant is increased for the reaction A + B
C if the concentration of A is increased
◦ an increase of temperature causes a decrease in the value of the equilibrium constant for an exothermic reaction
◦ when an equilibrium system is stressed, the system reacts to offset the stress
The Cephalocaudal Principle
Principle of Recuperation
Principle of Reversibility
Is the principle of cause and effect unfounded?
genetic code: The basic principle of translation
Physics- Density, Pressure and Pascal's Principle