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777dan777 [17]
3 years ago
8

En un recipiente cerrado y rígido se introdujo una mezcla gaseosa a cierta temperatura y las presiones parciales de cada gas son

: p(F2) = 2,00 atm, p(BrF) = 1,50 atm y p(BrF3) = 0,0150 atm. A la temperatura que se preparó la mezcla tiene lugar la reacción representada por:
BrF3 (g) ⇌ BrF(g) + F2(g) Kp(T) = 64,0

Elegir la afirmación correcta.

Seleccione una:
Qp > Kp, por lo tanto, las presiones parciales de BrF(g) y F2(g) aumentan hasta alcanzar el equilibrio.
Qp < Kp, por lo tanto, la presión parcial de BrF3(g) disminuye hasta alcanzar el equilibrio.
Qp = Kp, por lo tanto, las presiones parciales de BrF3(g), BrF(g) y F2(g) no cambian.
Qp < Kp, por lo tanto, las presiones parciales de BrF(g) y F2(g) disminuyen hasta alcanzar el equilibrio.
Qp > Kp, por lo tanto, la presión parcial de BrF3(g) aumenta hasta alcanzar el equilibrio.
Chemistry
1 answer:
valkas [14]3 years ago
7 0

Answer:

Qp > Kp, por lo tanto, la presión parcial de BrF₃(g) aumenta hasta alcanzar el equilibrio.

Explanation:

Paso 1: Escribir la ecuación balanceada

BrF₃ (g) ⇌ BrF(g) + F₂(g)      Kp(T) = 64,0

Paso 2: Calcular el cociente de reacción (Qp)

Qp = pBrF × pF₂ / pBrF₃

Qp = 1,50 × 2,00 / 0,0150 = 200

Paso 3: Sacar una conclusión

Dado que Qp > Kp, la reacción se desplazará hacia la izquierda para alcanzar el equilibrio, es decir, la presión parcial de BrF₃(g) aumenta hasta alcanzar el equilibrio.

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ANEK [815]

Answer:

The molar mass of the unknown substance is 255g/mole

Explanation:

Freezing point depression is given by

ΔT = i · Kf · m

Where

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i = van't Hoff's factor = i for non electrolyte

Kf = 20.4 °C/m = cryoscopic constant

ΔT = Freezing point depression

Therefore ΔT = 6.6 - 5 = 1.6 °C

1.6 °C = 20.4 °C/m × 1 × m

Therefore m = 1.6/20.4 = 0.0784 m

number of moles in 2.50 g of cyclohexane = 0.0784 m or 0.0784 moles of the substance in 1000 grams of cyclohexane. That is

2.5 ×0.0784/1000 moles in 2.5 graams of cyclohexane  that is

1.96 × 10⁻⁵ moles in 2.5 grams of cyclohexane

1.96 × 10⁻⁵ moles of the substance weighs 0.050 grams

Therefore 1 Mole weighs (0.05 g)/(1.96 × 10⁻⁵ moles) = 255g/mole

7 0
3 years ago
Why would an electrician use parallel circuits to wire the lights in each room of a house instead of using a series circuit?
aivan3 [116]
B.
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Explanation:

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How much heat is produced by combustion 125 g of methanol under standard state condaitions?
timurjin [86]

Answer:

Explanation:

For the reaction ,

2CH₃OH   +   3O₂   →   2CO₂  +  4 H₂O

For the above reaction ,

the change in enthalphy is calculated as

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In case the compound is in its standard state , enthalphy of formation is zero

Hence ,

for the above reaction ,

ΔHrxn =( 2 * Δ H° (CO₂ ) + 4 * Δ H° (H₂O )) - [ ( 2 *Δ H°CH₃OH  ) + (3 * Δ H° O₂ )]

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Δ H° O₂  = 0

putting the corresponding values ,

ΔHrxn =( 2 * -393.5kJ /mol + 4 *- 241.8kJ /mol) - [ ( 2 *-239.2kJ /mol  ) + (3 *0 )

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Moles of methanol,

Moles is denoted by given mass divided by the molecular mass ,  

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n = w / m

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m = molecular mass .

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w = 125 g

as we know ,

m = 32 g /mol

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Now using unitary method ,

1 mol produces = -1275.8 kJ /mol / 2  heat ,

3.906 mol produces = -1275.8 kJ /mol / 2 * 3.906 heat

3.906 mol produces = 249.7 kJ

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3 years ago
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Yuki888 [10]

Answer:

See explanation

Explanation:

Surface area has to do with the number of solid particles that are exposed at a given time and is capable of colliding with other reactant particles. When more surface area is exposed for reaction, then it means that more particles are likely to collide with each other leading to faster chemical reaction rates. When few particles are exposed for reaction (low surface area) then less collisions occur and the rate of reaction is decreased.

Similarly, concentration refers to the amount of substance present. The greater the amount of substance present, the greater the likelihood of collision between particles and the greater the rate of reaction and vice versa.

7 0
2 years ago
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