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Karo-lina-s [1.5K]
3 years ago
14

Suppose that, in a given reaction, the enthalpy (H) increases by 10 units, and the disorder (TS) increases by 12 units. By how m

any units did the Gibbs free energy change?When I did the calculation it came out to 2 units but the answer is -2 units. Why is that? Also, is T(delta)S treated as one single unit or separate?
Chemistry
1 answer:
gavmur [86]3 years ago
6 0

Answer:

-2

Explanation:

Gibbs free energy is defined by enthalpy of the system minus the product of the temperature and entropy and represented by the formula below:

G = H - TS where G = Gibbs free energy, H = enthalpy and T =  temperature and S = entropy

change in entropy is defined by the formula below

ΔG = ΔH - Δ(TS)  if the temperature is not constant, but if the temperature is constant then

ΔG = ΔH - TΔS

in according to the question (TS) is treated together.

to the solution

increase in H = 10 units , increase in the product of temperature and entropy = 12 units

ΔG = 10 - 12 = -2

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What is the charge of an atom's nucleus of an atom has 20 protons, 23 neutrons, and 18 electrons?
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3 years ago
What is the empirical formula for a compound which contains 67.1 zinc and the rest is oxygen
wolverine [178]

Answer:

The empirical formula is ZnO2

Explanation:

What is the empirical formula for a compound which contains 67.1% zinc and the rest is oxygen?

Step 1: Data given

Suppose the compound has a mass of 100.0 grams

A compound contains:

67.1 % Zinc  = 67.1 grams

100 - 67.1 = 32.9 % oxygen  = 32.9 grams

Molar mass of Zinc = 65.38 g/mol

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Step 2: Calculate moles of Zinc

Suppose the compound is 100 grams

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Moles Zn = 1.026 moles

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Moles O = 2.056 moles

Step 4: Calculate mol ratio

We divide by the smallest amount of moles

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The empirical formula is ZnO2

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