A mixture of CH4 and H2O is passed over a nickel catalyst at 1000 K. The emerging gas is collected in a 5.00-L flask and is found to contain 8.62 g of CO, 2.60 g of H2, 43.0 g of CH4, and 48.4 g of H2O.
Answers
The given question is incomplete. But the complete question is this:
A mixture of and
is passed over a nickel catalyst at 1000 K. The emerging gas is collected in a 5.00-L flask and is found to contain 8.62 g of CO, 2.60 g of
, 43.0 g of
, and 48.4 g of
. Assuming that equilibrium has been reached, calculate
for the reaction.
Explanation:
As the given reaction is as follows.
And, we know that
No. of moles =
Therefore, calculate the moles as follows.
Moles of =
= 2.6808 mol
Moles of =
= 2.6866 mol
Moles of CO =
= 0.307747 mol
Moles of =
= 1.2897 mol
As, we know that
Concentration =
Given volume = 5 L
Hence, calculate the concentration of given species as follows.
Conc. of
= 0.5361
Conc. of
= 0.5373
Conc. of CO =
= 0.06155
and, Conc. of
= 0.2579
Now, expression for equilibrium constant for the given reaction is as follows.
Now, putting the given values into the above formula as follows.
Also, we know that
Consider the equation
Calculate change in moles of gas as follows.
change in gas moles (dn) = 1 + 3 - 1 - 1
dn = 2
As,
It is given that,
T = 1000 K, R = 0.0821
So,
= 24.70
Thus, we can conclude that value of for the reaction is 24.70.
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The statements that are correct are ‘A large Keq value indicates that products are favored.’ And ‘A small Keq value indicates that the reverse reaction will occur very quickly.’ Having large Keq means that the concentration of the product is greater than the reactants and so products are favored. Having small Keq means that the concentration of the reactants is greater than the product.
Answers
In this situation the pressure in the container is less than the atmosphere.
742 - 86 = 656 torr
Answer: 656 mmHg
Explanation:
Manometers are used to measure the pressure in a container by comparing it to normal atmospheric pressure.
First convert the atmospheric pressure to mmHg
1 torr = 1 mmHg
Therefore, the atmospheric pressure = 742 mmHg
Since the arm connected is higher than the level of the Mercury open to the atmosphere, then the gas pressure is lower than the atmospheric pressure.
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Pgas = Patm - change in height
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endothermic and exothermic reactions.
4
O Endothermic reactions absorb heat
energy while exothermic reactions
release heat energy.
O Exothermic reactions absorb heat
energy while endothermic reactions
release heat energy.
O Endothermic and exothermic reactions
absorb thermal energy.
O Endothermic and exothermic reactions
release thermal energy.
REM
The prefix exo-
applied to a che
mean energy
re
Answers
Statement-1 is the correct answer that is Endothermic reactions absorb heat energy while exothermic reactions release heat energy.
How can we distinguish between exothermic and endothermic processes?
Chemical reactions that release energy are referred to as exothermic. More energy is produced than is needed to break the bonds between the reactants when bonds are formed in the byproducts of exothermic processes.
Chemical processes that either use or absorb energy are referred to as endothermic. In endothermic reactions, more energy is absorbed when bonds in the reactants are broken than is released when new bonds are formed in the products. Since an isothermic chemical reaction uses exactly as much energy as it produces, there is no net energy change.
Therefore, the first statement is the right response.
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Final answer:
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When comparing the ability of different types of radiation to penetrate matter, from least penetrating to most penetrating, the sequence is alpha < beta < neutron < gamma. This means the gamma radiation is the most penetrating type of radiation. Alpha radiation has the least penetration ability and can be blocked by even a thin sheet of paper. Beta radiation has slightly higher penetration power, able to go through about 3mm of aluminum, for instance. Gamma radiation, on the other hand, can penetrate much denser and thicker materials. For example, high-energy gamma radiation can pass through a few feet of concrete, and even lead to a depth of 2 or more centimeters.
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