The values of ionic product kw are 0.64 x 10^-14 at 180 C, and 1 x 10^-14 at 25 C from this may be derived that
Correct answer: A. Endothermic process
- A. Endothermic process
- B. Exothermic process
- C. Vaporization process
- D. Change of H2O into O2 and H2
Explanation
The ionic product of water (Kw) is the product of the concentrations of hydrogen ions (H+) and hydroxide ions (OH-) in water. It is defined by the equation: Kw = [H+][OH-] At 180°C, the value of Kw is given as 0.64×10-14, and at 25°C, it is given as 1×10-14. We know that the value of Kw is temperature dependent. As the temperature increases, the value of Kw also increases. The increase in Kw with increasing temperature is an endothermic process. Endothermic processes absorb heat or energy from the surroundings, increasing the value of Kw.
Last updated
About Le Chatelier's Principle
Le Chatelier's principle predicts how an equilibrium responds when concentration, pressure or temperature changes. Questions apply it to reversible reactions, identify the direction of shift and distinguish genuine equilibrium changes from the effect of a catalyst, which changes the rate of reaching equilibrium but not its position.
Practise Chemical Equilibrium
625 free Chemical Equilibrium MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
A chemical engineer wants to use the Haber process in order to produce ammonia as raw material for fertilizers. Which of the following parameters must the chemical engineer AVOID in order to obtain the maximum yield of ammonia?N2(g) + 3H2(g) -> 2NH3(g) ΔH0 = -92.6 kJ/mol
Adding a catalyst to a system at equilibrium
An exothermic reaction is allowed to reach equilibrium; if heat energy is then removed, the equilibrium will shift
By decreasing the pressure the reaction will go to that direction where_________________?
Change in pressure will only affect the substance which are in: