4) Chemical Reactions Because S is a state function, the standard molar entropy change for chemical reaction â¬ Î´ S r ! may be calculated using a method similar to that for calculating standard molar enthalpies of reaction, Î´ S r ! = !Î½ i S ii â . (25) In Eq.1) Also, since the heat evolved at constant pressure is the enthalpy change, â¬ q rev = p Î´ H, the entropy change for a phase transition becomes â¬ Î´ S = Î´ HT. (2) Example Determine the standard molar entropy for the following phase transition occurring at 1 bar pressure and 100Â°C, 2â¬ HO (â) â H 2 O (g) .
In the Western tradition of music, there are basically twelve keys, corresponding to the twelve notes of the chromatic scale on a keyboard instrument (ie C, C#, D, D#...etc all the way up to C again). But as these can be either major or minor, we end up with a total of 12 major + 12 minor = 24 possible keys.
An octave, as the name suggest has the number 8 related with it. There are 7 major notes in music viz. C D E F G A B || C D E F G A || C D... As you further move ahead the pitch increases. The lower C has a lower pitch than the higher C, but the sound that the note creates is the same. The number of notes between the higher and lower C (Including the higher C), are 8. Thus an octave is difference between a particular note, and its higher or lower counterpart in terms of pitch.