Use Hess's law and the following equations to calculate the ΔHreaction for the reaction CO(g) + 3H2(g) CH4(g) + H2O(g). (Show your work.) (4 points) • C(s) + O2(g) CO(g) ΔH = –110.5 kJ • C(s) + 2H2(g) CH4(g) ΔH = –74.85 kJ • H2(g) + O2(g) H2O(g) ΔH = –241.83 kJ
Answers
Answer: The enthalpy of reaction is, -206.18 kJ
Explanation:-
According to Hess’s law of constant heat summation, the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps.
According to this law, the chemical equation can be treated as ordinary algebraic expression and can be added or subtracted to yield the required equation. That means the enthalpy change of the overall reaction is the sum of the enthalpy changes of the intermediate reactions.
The final reaction is
The intermediate balanced chemical reaction will be,
(1)
(2)
(3)
Now adding (2) and (3) and subtracting (1) , we get :
Therefore, the enthalpy of reaction is, -206.18 kJ
Final answer:
To calculate the ΔHreaction for the given reaction using Hess's Law, we need to manipulate the given equations and sum up the ΔH values. After manipulating the equations and summing up the ΔH values, the ΔHreaction is -280.03 kJ.
Explanation:
To calculate the ΔHreaction for the given reaction, we can use Hess's Law. We need to manipulate the given equations to match the overall reaction. Since the overall reaction involves CO, H2, CH4, and H2O, we can use the given equations as follows:
- Reverse the equation for CO(g) + O2(g) → CO(g) to get CO(g) → C(s) + O2(g).
- Double the equation for C(s) + 2H2(g) → CH4(g) to get 2C(s) + 4H2(g) → 2CH4(g).
- Leave the equation for H2(g) + O2(g) → H2O(g) as is.
Add up the manipulated equations and their respective ΔH values:
- CO(g) → C(s) + O2(g) (ΔH = 110.5 kJ)
- 2C(s) + 4H2(g) → 2CH4(g) (ΔH = -2 * 74.85 kJ = -149.7 kJ)
- H2(g) + O2(g) → H2O(g) (ΔH = -241.83 kJ)
Now, sum up the ΔH values:
110.5 kJ + (-149.7 kJ) + (-241.83 kJ) = -280.03 kJ
Therefore, the ΔHreaction for the reaction CO(g) + 3H2(g) → CH4(g) + H2O(g) is -280.03 kJ.
Learn more about Hess's Law here:
#SPJ3
Related Questions
Find the grams of iron in 79.2 g of Fe2O3.
A mixture which contains more than one phase is called .
The empirical formula for a compound is CH2. If n is a whole number, which shows a correct relationship between the molecular formula and the empirical formula? a)<br /><br /> empirical formula mass / molecular mass = n<br /><br /> B) molecular mass = element mass / empirical formula mass ´ 100<br /><br /> c) subscript of H in empirical formula = 2  subscript of H in molecular formula<br /><br /> D) subscript of C in molecular formula = n  subscript of C in empirical formula<br /><br />
Which of the following best explains why the atomic mass is a fraction between 72 and 73? Options: A. The atomic mass is the weighted average of all the naturally occurring isotopes of the element. B. The atomic mass is determined by the number of protons in the nucleus. C. The atomic mass is a whole number, but it appears as a fraction due to rounding in the periodic table. D. The atomic mass is a decimal number because it represents the total number of electrons in the atom.
Answers
Answer: The molecular weight of the dibasic acid is 89.6 g/mol
Explanation:
Normality is defined as the amount of solute expressed in the number of gram equivalents present per liter of solution. The units of normality are eq/L. The formula used to calculate normality:
....(1)
We are given:
Normality of solution =
Given mass of solute = 0.56 g
Volume of solution = 250 mL
Putting values in equation 1, we get:
Equivalent weight of an acid is calculated by using the equation:
.....(2)
Equivalent weight of acid = 44.8 g/eq
Basicity of an acid = 2 eq/mol
Putting values in equation 2, we get:
Hence, the molecular weight of the dibasic acid is 89.6 g/mol
Answers
I'm still unaware of possible bonds between 2 metals (are there any? :) )
Final answer:
Ionic compounds form when a metal and nonmetal bond, as the metal loses its valence electrons which the nonmetal gains, resulting in an ionic bond. Covalent compounds form when two nonmetals bond, as they tend to share electrons allowing them to complete their valence shells resulting in a covalent bond.
Explanation:
The formation of ionic and covalent compounds depends on the elements involved and their properties. Metals, generally, have few valence (outer shell) electrons, while nonmetals have more. When a metal and nonmetal bond, the metal tends to lose its valence electrons, becoming a positively charged ion or cation, and the nonmetal gains these electrons, becoming a negatively charged ion or anion. This transfer of electrons results in an ionic bond.
On the other hand, when two nonmetals bond, they tend to share electrons because neither atom can completely overcome the other's attraction for electrons. These shared electrons allow them to complete their valence shells. This sharing of electrons results in a covalent bond.
Learn more about Ionic and Covalent Compounds here:
#SPJ6
I got bored and decided to play the password game-
Rule 18 is: The elements in your password must have atomic numbers that add up to 200.
The current elements I have are: Ne, V, W, Re
I don't know what any of this is- I failed chem but please help ;-;
Also ignore my username, I haven't used this account in like two years-
Answers
If I were to create a password out of elements of the periodic table such that the sum of them would add upto 200 ,
I would be using these elements
Berillium = 4 [Be]
Sulphur = 16 [S]
Uranium = 92 [U]
Nitrogen = 7 [N]
Hydrogen = 1 [H]
Iodine = 53 [I]
Neon = 10 [Ne]
and the password would be " Be SUNSHHINe " which adds upto [4 + 16 + 92 + 7 + 16 + 1 + 1 + 53 + 10 = 200 ].
Final answer:
The given elements' atomic numbers add up to 182. To meet the requirement of Rule 18 (total of 200), you need elements that add up to 18 (200-182). By adding Fluorine (F) and Argon (Ar), both with atomic numbers of 9, you can reach the required total.
Explanation:
The periodic elements provided in the question are Neon (Ne), Vanadium (V), Tungsten (W), and Rhenium (Re). Their respective atomic numbers are 10, 23, 74, and 75. If you add these atomic numbers together, the total is 182. This means you need elements that will add up to 18 (200-182) to meet the requirement of Rule 18. Adding Fluorine (F) with an atomic number of 9 and Argon (Ar) with an atomic number of 9 can help you reach this required total.
To summarize:
Neon (Ne) = 10,
Vanadium (V) = 23,
Tungsten (W) = 74,
Rhenium (Re) = 75,
Total so far = 182,
Your password needs atomic numbers total = 200,
You're short of = 200 - 182 = 18.
Adding Fluorine (F) with atomic number 9 and Argon (Ar) also with atomic number 9 gives = 9+9 = 18.
Learn more about Atomic numbers here:
#SPJ2
Answers
Answers
Answer:
5 pumpkin pies could be made with 7.5 cups of sugar.
Explanation:
The conversion factor to solve the problem is:
B. calcium
C. rhodium
D. chlorine
Answers
Answer:
Calcium
Explanation:
Calcium is needed in our body to make bones (skeletal system) and teeth strong. Apart from making bones and teeth strong, it is required in other body functions such as:
Enabling blood to clot
Helping in muscle contraction
Helping heart muscle in maintaining normal heart beat
About 99% of calcium present in the body is stored in bones. Calcium is stored in bones in the form of calcium phosphate.
Bones continuously replace old calcium with new one. Calcium is not produced in our body. It comes from daily diet, therefore, it essential to take calcium rich diet.
If your bones don't have enough calcium you get osteoporosis.