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3 years ago

13

Isotopes of the same element differ in

1 answer:

horrorfan [7]3 years ago

8 0

They are uniform in the amount of protons and electrons but can differ in the amount of neutrons.

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Calculate the equilibrium constant at 298 K for the reaction of formaldehyde (CH2O) with hydrogen gas using the following inform

Mariana [72]

Answer:

E. 8.08 x 10⁴.

Explanation:

Hello,

In this case, for the reaction:

$CH_2O(g) + 2H_2(g) \rightleftharpoons CH_4(g) + H_2O(g)$

We can compute the Gibbs free energy of reaction via:

$\Delta G\°=\Delta H\°-T\Delta S\°$

Since both the entropy and enthalpy of reaction are given at 298 K (standard temperature), therefore:

$\Delta G\°=-94.9kJ-(298K)(-224.2\frac{J}{K}*\frac{1kJ}{1000kJ} )\\\\\Delta G\°=-28.1kJ$

Then, as the equilibrium constant is computed as:

$K=exp(-\frac{\Delta G\°}{RT} )$

We obtain:

$K=exp(-\frac{-28.1kJ/mol}{8.314x10^{-3}\frac{kJ}{mol* K}}*298K )\\\\K=8.08 x10^4$

For which the answer is E. 8.08 x 10⁴.

Best regards,

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4 years ago