1.equillibrium constant only changes for change in temp? not for change in pressure etc.

2. rate of reaction can be measure by measuring how long it takes for products to form or how long it takes for reactants to be consumed? so is the rate of consumption of products = to rate of production of reactants
but the promblem is each indiviual reactant and product has a differnt rate of reaction?
3.when water vapour moleculed collide with liquid surface of water how is energy transfered and to what for the h2o(g) to turn h2o(l)

too add to the questions in a equillbrium system say 3h2+n2-->2nh3 all in gas form if another gas like oxygen was added what would happen to equillbrium system

or Nacl(s)--> na^+(aq) + cl^-(aq)
what affect would changing pressure or conecntration or increasing temp have on this system because a solid is involved would it be different.

1. yes. only T changes K.

2.I think the coefficients must be considered. If 2A + B ==> C, the production of C is only 1/2 that of A. right?
3. Look at it this way with an equation.
H2O(l) + energy ==> H2O(g). So if we are going form right to left, then energy is given up (it's an exothermic process) so the energy is given up, either to the liquid molecules or to the surrounding air.
Second post:
For N2 + 3H2 ==> 2NH3, if we add helium (so no reaction can take place--oxygen might do that), then
Kp = p(H2)^3*p(N2)/p(NH3). So by adding helium to the system, do you change the partial pressures of any of the reactants or products? Nope. So Kp can't change.
For the NaCl system, that is a strong electrolyte and it has no K. But even if it did, adding more solid to solid that's already there doesn't change the concn of the solide, It is still 1 by definition. Increasing T of NaCl will change the solubility. You know that.

1. The equilibrium constant (Keq) of a chemical reaction only changes with a change in temperature. This is due to the fact that temperature affects the energy and kinetics of the reaction, altering the ratio of products to reactants at equilibrium. Changes in pressure or other factors do not directly impact the equilibrium constant.

To calculate the equilibrium constant for a reaction at a given temperature, you would need the balanced chemical equation for the reaction and the concentrations (or partial pressures) of the reactants and products at equilibrium. Keq is calculated as the ratio of the concentration of the products to the concentration of the reactants, with each concentration raised to the power of its coefficient in the balanced equation.

2. The rate of a chemical reaction can indeed be measured by observing the time it takes for either the products to form or the reactants to be consumed. This can be done using various experimental techniques, such as spectrophotometry or titration.

The rate of consumption of products is equal to the rate of production of reactants, according to the stoichiometry of the balanced chemical equation. However, it is important to note that different reactants and products can have different rates of reaction. This is because the rate of a reaction is determined by factors such as the concentration of reactants, temperature, presence of catalysts, and the reaction mechanism.

3. When water vapor molecules collide with the liquid surface of water (H2O(l)), energy is transferred through various processes. A collision between water vapor molecules and the liquid water surface can result in several energy transfer mechanisms:

- Condensation: Some of the water vapor molecules lose kinetic energy and transition from the gaseous phase (H2O(g)) to the liquid phase (H2O(l)), releasing heat energy.
- Evaporation: Conversely, some liquid water molecules gain enough kinetic energy from collisions with water vapor molecules to overcome intermolecular forces and transition to the gaseous phase, absorbing heat energy from the surroundings.
- Conduction: Energy can be transferred through direct molecular collisions between water vapor molecules and liquid water molecules, with energy being transferred from higher energy particles to lower energy particles.
- Radiation: Energy can also be transferred through the emission and absorption of electromagnetic waves, such as infrared radiation, by water vapor molecules and liquid water molecules.

These energy transfer processes contribute to the overall phase change from water vapor (g) to liquid water (l).