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3 years ago

What is the value of DeltaG in a spontaneous reaction

2 answers:

6 0

Gibbs free energy of a reaction ( Δ G ) is the change in free energy of a system that undergoes the chemical reaction. It is the energy associated with the reaction, which is available to do some useful work. If ΔG<0 , then the reaction can be utilized to do some useful work. If ΔG>0 , then work has to be done on the system or external energy is required to make the reaction happen. ΔG=0 when the reaction is at equilibrium and there is no net change taking place in the system.

mr_godi [17]3 years ago

5 0

I believe that DeltaG is negative for a spontaneous reaction.

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A balloon originally had a volume of 4.39 L at 44C and a pressure of 729 torr to what temperature must the balloon be cooled

VMariaS [17]

The new temperature : 11.56 °C

<h3>Further explanation </h3>

Boyle's law and Gay Lussac's law

$\tt \dfrac{P_1.V_1}{T_1}=\dfrac{P_2.V_2}{T_2}$

P1 = initial gas pressure (N/m² or Pa)

V1 = initial gas volume (m³)

P2 = final gas pressure

V2 = final gas volume

T1 = initial gas temperature (K)

T2 = final gas temperature

V₁=4.39 L

T₁=44+273=317 K

P₁ = 729 torr = 0,959211 atm

V₂=3.78 L

P₂= 1 atm

$\tt \dfrac{0.959211\times 4.39}{317}=\dfrac{1\times 3.78}{T_2}\\\\T_2=\dfrac{1\times 3.78\times 317}{0.959211\times 4.39}\\\\T_2=284.559~K=11.56~C$

3 0

3 years ago

Assume that in each pair of compounds be- low the type of crystal structure is similar. Consider the strength of the attractive

bixtya [17]

The answer is three or two I'm pretty sure

5 0

3 years ago

What is the formula for the binary compound between potassium and iodine

Stels [109]

The answer is KI. K is potassium and I is iodine.

7 0

3 years ago

Without doing a calculation, arrange the following group of molecules in order of decreasing standard molar entropy (S^o ):

stellarik [79]

Answer:

d. C6H14 > C6H12 > C6H6

Explanation:

Standard molar entropy has to do with the number of atoms that are present in each of the species. The greater the number of atoms possessed by the species, the higher the value of the standard molar entropy due to a greater number of vibration modes.

Hexane (C6H14) has the highest number of atoms followed by cyclohexane (C6H12) and lastly benzene (C6H6).

Thus the order of decreasing molar entropy is; C6H14 > C6H12 > C6H6.

8 0

3 years ago

What is the half life of a radioisotope if 25.0 grams of anoriginal 200.-gram sample of the isotope remainsunchanged after 11.46

jeka94

Half-life is the amount of time, in days or years( most common) a certain substance disintegrate half of it's content.
We are given the initial (Ao) and final (A) amount of the substance. The time passed (T) is also given and we are asked to find the half-life (t). We use the equation below:

A=Aoe^(-ln2/t)T
25=200e^(-ln2/t)(11.46)
Solve for t
Answer: 3.82 days

5 0

3 years ago