A reaction in which energy is absorbed from the surroundings is called anendothermic<span> reaction. In </span>endothermic<span> reactions the enthalpy of the products is greater than the enthalpy of the reactants. Because reactions release or absorb energy, they affect the temperature of their surroundings.
</span>
Answer: 
Explanation: The given chemical reaction is:
Equilibrium constant (Kc) in general is written as:
![K_c=\frac{[products]}{[reactants]}](https://tex.z-dn.net/?f=K_c%3D%5Cfrac%7B%5Bproducts%5D%7D%7B%5Breactants%5D%7D)
Note:- Coefficients are written as their powers
So, the Kc expression for the above reaction will be:
![K_c=\frac{[NO]^2[Br_2]}{[NOBr]^2}](https://tex.z-dn.net/?f=K_c%3D%5Cfrac%7B%5BNO%5D%5E2%5BBr_2%5D%7D%7B%5BNOBr%5D%5E2%7D)
Equilibrium moles are given for all of them. Let's divide the moles by given liters to get the concentrations.
![[NOBr]=\frac{0.412mol}{10.3L}](https://tex.z-dn.net/?f=%5BNOBr%5D%3D%5Cfrac%7B0.412mol%7D%7B10.3L%7D)
= 0.040 M
![[NO]=\frac{0.678mol}{10.3L}](https://tex.z-dn.net/?f=%5BNO%5D%3D%5Cfrac%7B0.678mol%7D%7B10.3L%7D)
= 0.0658 M
![[Br_2]=\frac{0.224mol}{10.3L}](https://tex.z-dn.net/?f=%5BBr_2%5D%3D%5Cfrac%7B0.224mol%7D%7B10.3L%7D)
= 0.0217 M
Plug in the values in the equilibrium expression to calculate Kc.
Answer:
Rain is liquid water in the form of droplets that have condensed from atmospheric water vapor and then become heavy enough to fall under gravity. Rain is a major component of the water cycle and is responsible for depositing most of the fresh water on the Earth. It provides suitable conditions for many types of ecosystems, as well as water for hydroelectric power plants and crop irrigation.
