Answer:
Equilibrium concentrations of the gases are
![H_2S=0.596M](https://tex.z-dn.net/?f=H_2S%3D0.596M)
![H_2=0.004 M](https://tex.z-dn.net/?f=H_2%3D0.004%20M)
![S_2=0.002 M](https://tex.z-dn.net/?f=S_2%3D0.002%20M)
Explanation:
We are given that for the equilibrium
![2H_2S\rightleftharpoons 2H_2(g)+S_2(g)](https://tex.z-dn.net/?f=2H_2S%5Crightleftharpoons%202H_2%28g%29%2BS_2%28g%29)
Temperature, ![T=700^{\circ}C](https://tex.z-dn.net/?f=T%3D700%5E%7B%5Ccirc%7DC)
Initial concentration of
![H_2S=0.30M](https://tex.z-dn.net/?f=H_2S%3D0.30M)
![H_2=0.30 M](https://tex.z-dn.net/?f=H_2%3D0.30%20M)
![S_2=0.150 M](https://tex.z-dn.net/?f=S_2%3D0.150%20M)
We have to find the equilibrium concentration of gases.
After certain time
2x number of moles of reactant reduced and form product
Concentration of
![H_2S=0.30+2x](https://tex.z-dn.net/?f=H_2S%3D0.30%2B2x)
![H_2=0.30-2x](https://tex.z-dn.net/?f=H_2%3D0.30-2x)
![S_2=0.150-x](https://tex.z-dn.net/?f=S_2%3D0.150-x)
At equilibrium
Equilibrium constant
![K_c=\frac{product}{Reactant}=\frac{[H_2]^2[S_2]}{[H_2S]^2}](https://tex.z-dn.net/?f=K_c%3D%5Cfrac%7Bproduct%7D%7BReactant%7D%3D%5Cfrac%7B%5BH_2%5D%5E2%5BS_2%5D%7D%7B%5BH_2S%5D%5E2%7D)
Substitute the values
![9\times 10^{-8}=\frac{(0.30-2x)^2(0.150-x)}{(0.30+2x)^2}](https://tex.z-dn.net/?f=9%5Ctimes%2010%5E%7B-8%7D%3D%5Cfrac%7B%280.30-2x%29%5E2%280.150-x%29%7D%7B%280.30%2B2x%29%5E2%7D)
![9\times 10^{-8}=\frac{(0.30-2x)^2(0.150-x)}{(0.30+2x)^2}](https://tex.z-dn.net/?f=9%5Ctimes%2010%5E%7B-8%7D%3D%5Cfrac%7B%280.30-2x%29%5E2%280.150-x%29%7D%7B%280.30%2B2x%29%5E2%7D)
![9\times 10^{-8}=\frac{(0.30-2x)^2(0.150-x)}{(0.30+2x)^2}](https://tex.z-dn.net/?f=9%5Ctimes%2010%5E%7B-8%7D%3D%5Cfrac%7B%280.30-2x%29%5E2%280.150-x%29%7D%7B%280.30%2B2x%29%5E2%7D)
By solving we get
![x\approx 0.148](https://tex.z-dn.net/?f=x%5Capprox%200.148)
Now, equilibrium concentration of gases
![H_2S=0.30+2(0.148)=0.596M](https://tex.z-dn.net/?f=H_2S%3D0.30%2B2%280.148%29%3D0.596M)
![H_2=0.30-2(0.148)=0.004 M](https://tex.z-dn.net/?f=H_2%3D0.30-2%280.148%29%3D0.004%20M)
![S_2=0.150-0.148=0.002 M](https://tex.z-dn.net/?f=S_2%3D0.150-0.148%3D0.002%20M)
Those are both correct! great job, keep up the good work (-:
Answer:
Explanation:
4NH₃ (g) + 3O₂ (g) ⇒ 2N₂ (g) + 6H₂ O(1)
Δ![H_r={\sum}{ \Delta }H_f(\text{product})-{\sum}{ \Delta }H_f(\text{reactant})](https://tex.z-dn.net/?f=H_r%3D%7B%5Csum%7D%7B%20%5CDelta%20%7DH_f%28%5Ctext%7Bproduct%7D%29-%7B%5Csum%7D%7B%20%5CDelta%20%7DH_f%28%5Ctext%7Breactant%7D%29)
ΔH r =(2ΔH f(N 2 )+6ΔH f (H 2 O(l)))−(4ΔH f (NH 3 (g))+3ΔH f (O 2 (g)))
ΔH rex =[2×0+6×(−286)]−[4×(−46)+3×0]=−1716+186
ΔH rex =−1532kJ/mol
Thermodynamics is a branch of physical chemistry that studies heat and its effects and interactions. Governed by the four main laws, thermodynamics plays a huge role in physics and chemistry, and is also responsible for the law of conservation of energy, a fundamental rule in science.
Answer:
Metallic structure
Explanation:
They have a high melting point due to the strong forces of attraction between the positive ions (cations) and the delocalised electrons. Moreover, they conduct electricity due to the sea of delocalised electrons.
<em>[Extra: It could be an ionic compound since they also have a high melting point, however they only conduct electricity in liquid or aqeouus state.]</em>