Answer:
Oxygen and magnesium combine in a chemical reaction to form this compound. After it burns, it forms a white powder of the magnesium oxide. Magnesium gives up two electrons to oxygen atoms to form this powdery product. This is an exothermic reaction.
Answer:
oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus.
Explanation:
the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus.
<u>Answer:</u> The standard Gibbs free energy of the given reaction is 6.84 kJ
<u>Explanation:</u>
For the given chemical equation:
![3A(g)+4B(g)\rightleftharpoons 2C(g)+3D(g)](https://tex.z-dn.net/?f=3A%28g%29%2B4B%28g%29%5Crightleftharpoons%202C%28g%29%2B3D%28g%29)
The expression of
for above equation follows:
![K_p=\frac{(p_C)^2\times (p_D)^3}{(p_A)^3\times (p_B)^4}](https://tex.z-dn.net/?f=K_p%3D%5Cfrac%7B%28p_C%29%5E2%5Ctimes%20%28p_D%29%5E3%7D%7B%28p_A%29%5E3%5Ctimes%20%28p_B%29%5E4%7D)
We are given:
![(p_A)_{eq}=5.70atm\\(p_B)_{eq}=4.00atm\\(p_C)_{eq}=4.22atm\\(p_D)_{eq}=5.52atm](https://tex.z-dn.net/?f=%28p_A%29_%7Beq%7D%3D5.70atm%5C%5C%28p_B%29_%7Beq%7D%3D4.00atm%5C%5C%28p_C%29_%7Beq%7D%3D4.22atm%5C%5C%28p_D%29_%7Beq%7D%3D5.52atm)
Putting values in above expression, we get:
![K_p=\frac{(4.22)^2\times (5.52)^3}{(5.70)^3\times (4.00)^4}\\\\K_p=0.0632](https://tex.z-dn.net/?f=K_p%3D%5Cfrac%7B%284.22%29%5E2%5Ctimes%20%285.52%29%5E3%7D%7B%285.70%29%5E3%5Ctimes%20%284.00%29%5E4%7D%5C%5C%5C%5CK_p%3D0.0632)
To calculate the equilibrium constant (at 25°C) for given value of Gibbs free energy, we use the relation:
![\Delta G^o=-RT\ln K_{eq}](https://tex.z-dn.net/?f=%5CDelta%20G%5Eo%3D-RT%5Cln%20K_%7Beq%7D)
where,
= standard Gibbs free energy = ?
R = Gas constant = 8.314 J/K mol
T = temperature = ![25^oC=[273+25]K=298K](https://tex.z-dn.net/?f=25%5EoC%3D%5B273%2B25%5DK%3D298K)
= equilibrium constant at 25°C = 0.0632
Putting values in above equation, we get:
![\Delta G^o=-(8.314J/Kmol)\times 298K\times \ln (0.0632)\\\\\Delta G^o=6841.7J=6.84kJ](https://tex.z-dn.net/?f=%5CDelta%20G%5Eo%3D-%288.314J%2FKmol%29%5Ctimes%20298K%5Ctimes%20%5Cln%20%280.0632%29%5C%5C%5C%5C%5CDelta%20G%5Eo%3D6841.7J%3D6.84kJ)
Hence, the standard Gibbs free energy of the given reaction is 6.84 kJ
Answer: The equilibrium constant
for this reaction is 0.088
Explanation:
Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. It is expressed as ![K_c](https://tex.z-dn.net/?f=K_c)
For the given chemical reaction:
![NO+NO_2(g)\rightarrow N_2O_3](https://tex.z-dn.net/?f=NO%2BNO_2%28g%29%5Crightarrow%20N_2O_3)
The expression for
is written as:
![K_c=\frac{[N_2O_3]}{[NO_2][NO]}](https://tex.z-dn.net/?f=K_c%3D%5Cfrac%7B%5BN_2O_3%5D%7D%7B%5BNO_2%5D%5BNO%5D%7D)
![K_c=\frac{(1.3)}{(3.9)\times (3.8)}](https://tex.z-dn.net/?f=K_c%3D%5Cfrac%7B%281.3%29%7D%7B%283.9%29%5Ctimes%20%283.8%29%7D)
![K_c=0.088](https://tex.z-dn.net/?f=K_c%3D0.088)
The equilibrium constant
for this reaction is 0.088
Answer:
las plantas
Explanation:
Las plantas son los seres vivos capaces de transformar energía luminosa utilizando agua y dióxido de carbono (CO₂) en energía química en forma de moléculas llamadas carbohidratos. El proceso a través del cual realizan esto se denomina fotosíntesis, y para ello requieren un pigmento de color verde denominado clorofila, el cual es necesario para captar la energía luminosa proveniente del Sol.