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Thermochemistry: Predicting Reaction Enthalpy Changes and Calculating Enthalpy of Reaction, Assignments of Chemistry

Material Type: Assignment; Class: INTROD CHEMISTRY I; Subject: Chemistry; University: Appalachian State University; Term: Fall 2003;

Typology: Assignments

Pre 2010

Uploaded on 08/26/2009

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SI 11-23-03
Predict the sign of the LlSo for the following reactions and then calculate the value for the
reaction
Dinitrogen tetrahydride gas reacts with hydrogen gas to form ammonia vapor .
NJ-H~ (l)) + ~~) -7 »JH3(j) ;::.Sc ..:>;~,\.)J
fl)°:.
2Solid aluminum reacts with chlorine gas to form solid aluminum chloride.
J AI6) J;:. 3L12 ~ -? J4JCl3(s) ~°:-? ~!~ ",e..
~
3
-,.-:--
J
-63.jLf K -~
4.
.)""-'\ { ,
~
~°.:: t
5.
~'t)
-
-j5J}; t
"'J:
;;:;-
k
~ ~'- -'
:::- -,~- -K
pf2

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SI 11-23-

Predict the sign of the LlSo for the following reactions and then calculate the value for the reaction Dinitrogen tetrahydride gas reacts with hydrogen gas to form ammonia vapor. NJ-H~(l)) + ~~) -7 »JH3(j) ;::.Sc ..:>;~,.)J

fl)°:.

2 Solid aluminum reacts with chlorine gas to form solid aluminum chloride. J AI6) J;:. 3L12 ~ -? J4JCl3(s) ~°:-? ~!~ ",e.. ~ 3 -,.-:-- J -63.jLf K -~

~ .)""-'{, ~°.:: t

~'t)

-j5J}; t "'J: ;;:;- k ~ ~'- -' :::- -,~- -K

Determine the ~H for the following reaction

4NH3(g) + SO2(g) -+- 4NO(g) + 6H2O(g)

Using the following data'

6.H = 180.6 kJ

NJg) + °2(g) -+ 2NO(g)

etL

~H=-91.8kJ NJg) + 3H2(g) ~ 2NH3(g)

L.H = -483.7 kJ 2H2(g) + Gig) -)- 2H2G(g)

~~ ;

,--

Kj )<.~

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'I

~l yl

(Q If R I)l...,

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