Homework Help: chemistry

Posted by CHRIS on Saturday, April 21, 2012 at 11:52am.

The standard molar entropy value of N2 (g) is 191.5 J/K-mol,
of O2 (g) is 205.0 J/K-mol and of NO2 (g) is 240.0 J/K-mol. From these values
we can calculate the Delta S for the reaction N2 (g) + 2 O2 (g) produces 2 NO2 (g) to be

a. – 156.5 J/K
b. 636.5 J/K
c. 15.5 J/K
d. – 121.5 J/K
e. – 83.5 J/K

help

chemistry - DrBob222, Saturday, April 21, 2012 at 3:21pm
dSrxn = (n*dSo products) - (n*dSo reactants)
chemistry - CHRIS, Saturday, April 21, 2012 at 5:56pm
how do i set this up?
chemistry - DrBob222, Saturday, April 21, 2012 at 7:39pm
.........N2 + 2O2 ==> 2NO2
.......191.5..205.0...240

dSrxn = (n*products)-(n*reactants)
dSrxn = (2*240) -[(191.5+2(205)]
chemistry - CHRIS, Sunday, April 22, 2012 at 12:49pm
d?
chemistry - DrBob222, Sunday, April 22, 2012 at 2:09pm
right.

Answer this Question

Related Questions

Chemistry(Please check answers) - 1) The standard molar entropy value of N2 (g) ...
Chemistry - Calculate the entropy of formation (J/K mol) of CS2(l). The value of...
Chemistry - Using data in table below and S °(NH3(g))= 192.5 J·mol-1&...
Chemistry - Using data in table below and S °(NaCl(s))= 72.38 J·mol-1...
Chemistry - Using data in table below and S °(NaCl(s))= 72.38 J·mol-1...
chemistry, please help - 2NO2(g)--> 2NO(g) + O2(g) , H=+114.2kJ (Note: H...
chemistry - Using data in table below and S °(CaSO4·H2O(s))= 194.0 J&...
chemistry - Using data in table below and S °(CaSO4·H2O(s))= 194.0 J&...
chemistry - Using data in table below and S °(CaSO4·H2O(s))= 194.0 J&...
Chemistry - N2+O2 <-> 2NO Equillibrium Concentrations of the gases...

For Further Reading

First Name:
School Subject:
Answer: