3 years ago

What is gravity and weight please answer

1 answer:

3 0

Weight is the force of gravity on an object. Weight depends on the strength of the gravitational field the object is in and the mass of the object. ... Mass is constant anywhere in the universe, whereas weight depends on the gravity where the object is present (Earth, the moon, Jupiter, etc.).

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Estimate ΔG°rxn for the following reaction at 775 K. 2Hg(g) + O2(g) → 2HgO(s) ΔH°= -304.2 kJ; ΔS° = -414.2 J/K

hichkok12 [17]

Answer:

$\Delta G^0_{rxn}=16.81kJ$

Explanation:

Hello!

In this case, since the Gibbs free energy of any process is related with the enthalpy change, temperature and entropy change as shown below:

$\Delta G^0=\Delta H^0-T\Delta S^0$

For a chemical reaction it is simply modified to:

$\Delta G^0_{rxn}=\Delta H^0_{rxn}-T\Delta S^0_{rxn}$

Thus, since the enthalpy of reaction is given as -304.2 kJ and the entropy as -414.2 J/K (-0.4142 kJ/K), at 775 K the Gibbs free energy of reaction turns out:

$\Delta G^0_{rxn}=-304kJ-775K*(-0.4142\frac{kJ}{K} )\\\\\Delta G^0_{rxn}=16.81kJ$