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2 years ago

The formula for Gibbs free energy is

Chemistry

2 answers:

UNO [17]2 years ago

5 0

At constant temperature and pressure, the change in Gibbs free energy is defined as DG= DH-TDS hope this helps bb ♡

Semmy [17]2 years ago

4 0

The formula for Gibbs free energy is G = H - TS

<u>Explanation: </u>

Gibbs free energy refers a form of thermodynamic potential like Helmholtz free energy. It depends on state functions like internal potential energy, pressure, volume, temperature and entropy.

Mostly, it is the measure of reversibility or spontaneity of the chemical reaction. The change in the Gibbs free energy between the reactants and products should be less than zero or minimised to have a spontaneous or reversible chemical reaction.

The mathematical representation is,

G = H - TS

Here, H= U+PV, H is the enthalpy of the reaction, the measure of heat energy required to start a chemical reaction, T is the temperature and S is the entropy, the measure of randomness caused in the chemical reaction.

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3 years ago

Chloroform is a liquid once used for anesthetic. What is the volume of 5.0 g of chloroform? The density of chloroform 1.49 g/mL

mario62 [17]

Answer:

3.3557047 mL

Explanation:

The density can be found using the following formula:

$d=\frac{m}{v}$

Let's rearrange the formula to find the volume, $v$ .

$d*v=\frac{m}{v}*v$

$d*v=m$

$\frac{d*v}{d} =\frac{m}{d}$

$v=\frac{m}{d}$

The volume can be found by dividing the mass by the density. The mass of the chloroform is 5 grams and the density is 1.49 grams per milliliter. Therefore,

$m= 5g \\d= 1.49 g/mL$

Substitute the values into the formula.

$v=\frac{5g}{1.49 g/mL}$

Divide. When we divide, the grams, or g, in the numerator and denominator will cancel out.

$v= \frac{5}{1.49}mL$

$v=3.3557047 mL$

The volume of 5 grams of chloroform is 3.3557047 milliliters

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Read 2 more answers

Why does Hess's law allow you to determine the enthalpy change of a<br> reaction?

lana [24]

Enthalpy is a state function

Explanation:

The Hess's law allows us to determine the enthalpy change of a reaction because enthalpy is a state function. It does not depend on the individual path take in going from reactants to products in the reaction.

Enthalpy changes are the heat changes accompanying physical and chemical changes.
It is the difference between the heat content of product in the final state and the reactants.
Enthalpy changes for some reactions are not easily measurable experimentally.
To calculate such heat changes, we apply the Hess's law of heat summation.
The law states that "the heat change of a reaction is the same whether it occurs in a step or several steps".
The Hess's law is simply based on the first law of thermodynamics by which we know that energy is conserved in every system.

learn more:

Hess's law brainly.com/question/11293201

#learnwithBrainly

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3 years ago