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Lady_Fox [76]
3 years ago
9

Hydrogen gas and bromine vapor react to form gaseous hydrogen bromide at 1300 K. The value of the equilibrium constant is 1.6 x

105. What is the value of the equilbrium constant for the decomposition of gaseous hydrogen bromide to form hydrogen gas and bromine vapor at 1300 K?
Chemistry
1 answer:
serious [3.7K]3 years ago
5 0

Often, the products of a chemical reaction can be combined with each other to form reagents again. The reactions in which this occurs are called reversible reactions. In these cases, the transformation of reactants into products is partial, reaching a state of chemical equilibrium in which the speeds of the direct reactions inverse are equalized.

The equilibrium constant of a chemical reaction is the value of its reaction quotient in chemical equilibrium. <u>The equilibrium constant (Kc) is expressed as the ratio between the molar concentrations (mol/L) of reactants and products</u>. Its value in a chemical reaction depends on the <u>temperature</u>, so it must always be specified.

In this way, we must first write the reaction in question (<em>do not forget to balance the reaction</em>),

H₂ + Br₂ → 2HBr

For this reaction the equilibrium constant is

Kc = \frac{[HBr]^{2} }{[H_{2} ][Br_{2} ]} = 1.6ₓ10⁵ at 1300 K.

The decomposition reaction of gaseous hydrogen bromide to form hydrogen gas and bromine vapor is

2HBr → H₂ + Br₂

Then, the equilibrium constant for this reaction is,

Kc' = \frac{[H_{2} ][Br_{2} ] }{[HBr]^{2}}

As you can notice <u>this equilibrium constant is the inverse of Kc</u>, so

Kc' = 1 / Kc = 1 / (1.6ₓ10⁵) → Kc' = 6.25ₓ10⁻⁶

So, the equilibrium constant for the decomposition of gaseous hydrogen bromide to form hydrogen gas and bromine vapor is 6.25ₓ10⁻⁶ at 1300 K.

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How many moles of N2O5 are needed to produce 7.90 g of NO2? 2N2O5 = 4NO2 + O2
miv72 [106K]
Moles of N2O5 = moles of NO2 * ( 2 moles of N2O5 / 4 moles of NO2
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Name three sources of CO2
dangina [55]

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1.Respiration of animals and plants.

2.The burning of fossil fuels.

3.Bacteria decompose corpses.

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3 years ago
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Oxygen gas generated in the thermal decomposition of potassium chlorate is collected over water. The volume of gas collected is
Leya [2.2K]

The mass of oxygen collected from the thermal decomposition of potassium chlorate at a temperature of 297 K and 762 mmHg is 0.16 g

<h3>How to determine the mole of oxygen produced </h3>

We'll begin by obtaining the number of mole of oxygen gas produced from the reaction. This can be obtained by using the ideal gas equation as illustrated below:

  • Volume (V) = 0.128 L
  • Temperature (T) = 297 K
  • Pressure (P) = 762 – 22.4 = 739.6 mmHg
  • Gas constant (R) = 62.363 mmHg.L/Kmol
  • Number of mole (n) =?

PV = nRT

739.6 × 0.128 = n × 62.363 × 297

Divide both sides by 62.363 × 297

n = (739.6 × 0.128) / (62.363 × 297)

n = 0.0051 mole

Thus, the number of mole of oxygen gas produced is 0.0051 mole

<h3>How to determine the mass of oxygen collected</h3>

Haven obtain the number of mole of oxygen gas produced, we can determine the mass of the oxygen produced as follow:'

  • Mole = 0.0051 mole
  • Molar mass of oxygen gas = 32 g/mole
  • Mass of oxygen =?

Mole = mass / molar mass

0.0051 = mass of oxygen / 32

Cross multiply

Mass of oxygen = 0.0051 × 32

Mass of oxygen = 0.16 g

Thus, we can conclude that the mass of oxygen gas collected is 0.16 g

Learn more about ideal gas equation:

brainly.com/question/4147359

#SPJ1

5 0
1 year ago
an aqueous solution contains 1.2mM of total ions. if the solution is NaCl (aq), what is the concentration of chloride ions?
Genrish500 [490]

Explanation:

As the total concentration is given as 1.2 mM. And, it is also given that salt present in the solution is NaCl.

As sodium chloride is an ionic compound so, when it is added to water then it will dissociate into sodium and chlorine ions as follows.

           NaCl \rightarrow Na^{+} + Cl^{-}

So, it means in total there will be formation of 2 ions when one molecules of NaCl dissociates.

Therefore, concentration of chlorine ions will be calculated as follows.

       Concentration of Cl^{-} ions = \frac{1.2mM}{2}

                                                        = 0.6 mM

Thus, we can conclude that the concentration of chloride ions is 0.6 mM.

5 0
3 years ago
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