Consider the reaction: 2NO ( g ) + O 2 ( g ) → 2 NO 2 ( g ) Estimate Δ G ° for this reaction at each temperature and predict whether the reaction is spontaneous. (Assume that Δ H ° and Δ S ° do not change too much within the given temperature range.) 298 K 715 K 855 K
Consider the reaction: 2NO ( g ) + O 2 ( g ) → 2 NO 2 ( g ) Estimate Δ G ° for this reaction at each temperature and predict whether the reaction is spontaneous. (Assume that Δ H ° and Δ S ° do not change too much within the given temperature range.) 298 K 715 K 855 K
Solution Summary: The author explains that the free energy change is used to evaluate the spontaneity of a process or reaction.
Estimate
Δ
G
°
for this reaction at each temperature and predict whether the reaction is spontaneous. (Assume that
Δ
H
°
and
Δ
S
°
do not change too much within the given temperature range.)
" is
The structure of the bicarbonate (hydrogen carbonate) ion, HCO3-, HCO3
best described as a hybrid of several contributing resonance forms, two of which
are shown here.
HO
:0:
:Ö:
HO
+
Bicarbonate is crucial for the control of body pH (for example, blood pH:
7.4). A more self-indulgent use is in baking soda, where it serves as a
source of CO2 CO₂ 2 gas, which gives bread and pastry their fluffy
constituency.
(i) Draw at least one additional resonance form.
=
(ii) Using curved "electron-pushing" arrows, show how these Lewis structures may
be interconverted by movement of electron pairs. (iii) Determine which form or
forms will be the major contributor(s) to the real structure of bicarbonate,
explaining your answer on the basis of the criteria in Section 1-5.
Which of these is the best use of a volumetric flask?
measuring how much liquid it contains
delivering a precise amount of liquid to another container
holding solutions
making solutions of precise concentration
Laboratory Experiments in Microbiology (12th Edition) (What's New in Microbiology)
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