For a reaction to be spontaneous under standard conditions at all temperatures, the signs of ΔH° and ΔS° must be negative and positive, respectively.
<span>Gibbs free energy (G) determines if reaction will proceed
spontaneously, if </span>ΔG is negative, reaction is spontaneous.<span>
ΔG = ΔH - T·ΔS.
ΔG - changes in Gibbs free energy.
ΔH - changes in enthalpy.
ΔS - changes in entropy.
T is temperature in Kelvins.</span>
Answer:
Explanation:
1) NO + O3 -> NO2 + O2 (slow)
2) NO2 + O -> NO + O2 (fast)
Overall reaction: O3 + O -> 2O2
1) rate = k [NO] [O3]; slow, rate determining step,
k = 6 x 10^-15 (cm^6/molecule
We know that it is a certainty based on things such as the size, mass, brightness, etc. They can determine to within a relative level of accuracy the age. Of course they can be off by millions of years, but that’s pretty precise for a 10–20 billion year time period for the life of a star. BUT we absolutely cannot predict exactly when it will explode and we see supernovas in other galaxies, but the last one in the Milky Way that we observed was in the 1600s.
Answer: Pink R-groups contain primarily C and H, which have approximately equal electronegativities and lack O; most green R-groups also contain a highlyelectronegative O atom.Green R-groups contain primarily C and H, which have approximately equal electronegativities and lack O; most pink R-groups contain a highlyelectronegative O atom
Explanation: I've been researching it for a while now
