A chemical reaction is considered spontaneous if A) the reaction releases heat, and B) if the entropy of the system increases. There is a formula known as the Gibbs Free Energy equation that predicts whether or not a reaction will be spontaneous; this formula considers the enthalpy side (heat) and the entropy side (disorder) of the reaction when making the prediction.
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Solute: koolaid mix , Sugar
Sovlent: water
Answer:
The hydroxide ion concentration in an aqueous solution, [OH-], in mol L-1, can be calculated if the pOH of the solution is known.
pOH is defined as the negative logarithm (to base 10) of the hydroxide ion concentration in mol L-1 pOH = -log10[OH-]
Explanation:
Explanation:
We have,
The most probable speed of an oxygen molecule in the gas phase at room temperature is 450 m/s.
The formula of the most probable speed of a gas molecule is given by :
![v_p=\sqrt{\dfrac{2RT}{M}}](https://tex.z-dn.net/?f=v_p%3D%5Csqrt%7B%5Cdfrac%7B2RT%7D%7BM%7D%7D)
So,
![450=\sqrt{\dfrac{2RT}{M}}\\\\\dfrac{RT}{M}=\dfrac{450^2}{2}\\\\\dfrac{RT}{M}=101250\ .....(1)](https://tex.z-dn.net/?f=450%3D%5Csqrt%7B%5Cdfrac%7B2RT%7D%7BM%7D%7D%5C%5C%5C%5C%5Cdfrac%7BRT%7D%7BM%7D%3D%5Cdfrac%7B450%5E2%7D%7B2%7D%5C%5C%5C%5C%5Cdfrac%7BRT%7D%7BM%7D%3D101250%5C%20.....%281%29)
The RMS speed of the gas molecule is given by :
![v_{rms}=\sqrt{\dfrac{3RT}{M}}\\\\v_{rms}=\sqrt{3\times \dfrac{RT}{M}}](https://tex.z-dn.net/?f=v_%7Brms%7D%3D%5Csqrt%7B%5Cdfrac%7B3RT%7D%7BM%7D%7D%5C%5C%5C%5Cv_%7Brms%7D%3D%5Csqrt%7B3%5Ctimes%20%5Cdfrac%7BRT%7D%7BM%7D%7D)
Use equation (1) in above equation :
![v_{rms}=\sqrt{3\times \dfrac{RT}{M}}\\\\v_{rms}=\sqrt{3\times 101250} \\\\v_{rms}=551.13\ m/s](https://tex.z-dn.net/?f=v_%7Brms%7D%3D%5Csqrt%7B3%5Ctimes%20%5Cdfrac%7BRT%7D%7BM%7D%7D%5C%5C%5C%5Cv_%7Brms%7D%3D%5Csqrt%7B3%5Ctimes%20101250%7D%20%5C%5C%5C%5Cv_%7Brms%7D%3D551.13%5C%20m%2Fs)
It is clear that the RMS speed of the gas molecule is greater than 450 m/s.