1 a) Determine the enthalpy change for the following reaction
under standard conditions and 25 ° C:
2Hg (l) + Cl2 (g) → Hg2Cl2
(s)
enthalpy for : Hg (l) = 0
Cl2 (g) = 0
Hg2Cl2 (s) = -265.22
b) The entropy change is for the reaction is -182.61 J K-1 mol-1 at
standard conditions and 25 ° C. Is the reaction spontaneous under
standard conditions and 25 ° C?
c) What will be the enthalpy change at 100...
Write and balance the combustion reaction for ethanol,
C2H5OH(l), under standard thermochemical conditions (25'C). Use
Hess' law and standard heats of formation to find deltaHrxn.
Remember, this combustion is a reaction with oxygen to produce
carbon dioxide and liquid water.
Given 2.72g of ethanol and 5.06g of oxygen gas are allowed to
react, determine 1) The mass in grams of each reactant/product
after complete reaction. Use the rxn table method to find the
limiting reactant and mass of products. 2)The...
Which reactions in the citric acid cycle are irreversible under
physiological conditions, and for each of these reactions, explain
why the reaction is irreversible.
1, Which of the following is NOT a role of Hydrochloric acid in
the stomach? There may be more than one correct answer - select all
that apply.
Group of answer choices
activate salivary amylase
unraveling/ "denaturing" proteins
hydrolysis of proteins
digestion of polysaccharides
activate pepsin
2, The standard used to estimate the average daily amount of a
nutrient considered adequate to meet the 97% of the needs of most
healthy people is the
Group of answer choices
DRI.
UL....
Under which conditions or in which situations are in-depth
interviews more appropriate, and under which conditions or in which
situations are focus groups more appropriate? Please support your
answer with additional sources/references and, if possible, provide
a short example.
The enthalpy change under standard conditions for which of the
reactions below would be equal to the ∆H°f of NaOH(s)? (A) Na(s) +
H2O(l) NaOH(s) + 1/2 H2(g) (B) Na(s) + 1/2 O2(g) + 1/2 H2(g)
NaOH(s) (C) Na(s) + 1/2 H2O2(l) NaOH(s) (D) Na+(aq) + OH–(aq)
NaOH(s) please explain why you chose that answer and why the other
answers are wrong. If it has to do with them being in their
standard states, how do...
A 0.2054 g sample of CaCO3 (primary standard) is dissolved in
hydrochloric acid and the solution is diluted with water to 250.0
mL (solution A). A 50.0 mL aliquot of solution A is titrated with
41.12 mL of EDTA solution. a) I calculated a Molarity of 0.00998.
Is this correct? (show all calculation). b) Now a 100.0 mL sample
of water containing Ca2+ and Mg2+ is titrated with 22.74 mL of the
EDTA solution in the example above at pH...
Determine the pH of (a) 0.20 M sulfuric acid (b) 0.20 M
hydrochloric acid, (c) 0.20 M sodium hydroxide, (d) 0.20 M acetic
acid, and (e) 0.20 M solution of NH3 at 25
oC.