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3 years ago

What determines the average kinetic energy of particles in a gas ?

2 answers:

6 0

This in turn determines whether the substance exists in the solid, liquid, or gaseous state. Molecules in the solid phase have the least amount of energy, while gas particles have the greatest amount of energy. The temperature of a substance is a measure of the average kinetic energy of the particles.

Advocard [28]3 years ago

6 0

Answer: Temperature of the substance determines the average kinetic energy of particles in a gas.

Explanation:

Average kinetic energy is defined as the average of all the kinetic energies of the particles in a system. It is a measure of temperature of the particles in a gas.

The equation used to calculate the average kinetic energy of the particles is given as:

$E=\frac{3RT}{2N_A}$

where,

R = Gas constant

T = Temperature of the gas

$N_A$ = Avogadro's number

E = Average kinetic energy of the particles

As, temperature is directly related to the average kinetic energy of the gas. Thus, the temperature of the particles increases, the average kinetic energy of the particles also increases and vice-versa.

Thus, temperature of the substance determines the average kinetic energy of particles in a gas.

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Be sure to answer all parts. the equilibrium constant (kp) for the reaction below is 4.40 at 2000. k. h2(g) + co2(g) ⇌ h2o(g) +

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a) first, to calculate ΔG° for the reaction:

we will use this formula:

ΔG° = -RT㏑Kp

when R is R- rydberg constant = 8.314J/mol.K

and T is the temperature in Kelvin = 2000 K

and Kp = 4.4

so, by substitution:

ΔG° = - 8.314 *2000 *㏑4.4

= - 24624 J/mol = - 24.6 KJ/mol

b) to calculate ΔG so, we will use this formula:

ΔG = ΔG° + RT㏑Qp

So we need first, to get Qp from the reaction equation:

when Qp = P products / P reactants

= PH2O*PCO / PH2 * PCO2

= (0.66 atm * 1.2 atm) / (0.25 * 0.78)

= 4.1

so by substitution:

ΔG = -24624 + 8.314*2000*㏑4.1

= -1162 J/mol = - 1.16 KJ/mol

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4 years ago

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