Give the direction of the reaction, if k > > 1. give the direction of the reaction, if k > > 1. the forward reaction is favored. if the temperature is raised, then the forward reaction is favored. neither direction is favored. if the temperature is raised, then the reverse reaction is favored. the reverse reaction is favored.

A. for K>>1 you can say that the reaction is nearly irreversible so the forward direction is favored. (Products formation)

B. When the temperature rises the equilibrium is going to change but to know how is going to change you have to take into account the kind of reaction. For endothermic reactions (the reverse reaction is favored) and for exothermic reactions (the forward reaction is favored)

Explanation:

A. The equilibrium constant K is defined as

In any case  

aA +Bb  equilibrium Cd +dD

where K is:

[] is molar concentration.

If K>>> 1 it means that the molar concentration of products is a lot bigger that the molar concentration of reagents, so the forward reaction is favored.

B. The relation between K and temperature is given by the Van't Hoff equation

Where: H is reaction enthalpy, R is the gas constant and T temperature.  

Clearing the equation for we get:

Here we can study two cases: when delta is positive (exothermic reactions) and when is negative (endothermic reactions)

For exothermic reactions when we increase the temperature the denominator in the equation would have a negative exponent so is greater that and the forward reaction is favored.

When we have an endothermic reaction we will have a positive exponent so will be less than the forward reactions is not favored.  

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