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mestny [16]
2 years ago
13

The change in enthalpy that occurs in the process of converting reactants to products in a chemical reaction is called the _____

of reaction.
Chemistry
2 answers:
Yuri [45]2 years ago
7 0

Answer:

The change in enthalpy that occurs in the process of converting reactants to products in a chemical reaction is called the heat of reaction.

zheka24 [161]2 years ago
6 0

Answer:

∆H or Enthalpy of the reaction

Explanation:

If ∆H is +ve

  • Reaction is exothermic
  • Example:-Combustion, mixing sodium/potassium in water

If ∆H is -ve

  • Reaction is endothermic
  • Ex:-Melting of ice
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At 400 K oxalic acid decomposes according to the reaction:H2C2O4(g)→CO2(g)+HCOOH(g)In three separate experiments, the intial pre
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Answer:

v = 2,66x10⁻⁵ P[H₂C₂O₄]

Explanation:

For the reaction:

H₂C₂O₄(g) → CO₂(g) + HCOOH(g)

At t = 0, the initial pressure is just of H₂C₂O₄(g). At t= 20000 s, pressures will be:

H₂C₂O₄(g) = P₀ - x

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HCOOH(g) = x

P at t=20000 is:

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For 1st point:

x = 92,8-65,8 = 27

Pressure of H₂C₂O₄(g) at t=20000s: 65,8-27 = 38,8

2nd point:

x = 130-92,1 = 37,9

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x = 157-111 = 46

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Now, as the rate law is :

v = k P[H₂C₂O₄]

Based on integrated rate law, k is:

(- ln P[H₂C₂O₄] + ln P[H₂C₂O₄]₀) / t = k

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k = 2,64x10⁻⁵

2nd point:

k = 2,65x10⁻⁵

3rd point:

k = 2,68x10⁻⁵

The averrage of this values is:

k = 2,66x10⁻⁵

That means law is:

v = 2,66x10⁻⁵ P[H₂C₂O₄]

I hope it helps!

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