Question
In: Biology
Mammals excrete excess nitrogen in the form of urea, CO(NH2)2. Urea can react with water to...
Mammals excrete excess nitrogen in the form of urea, CO(NH2)2. Urea can react with water to form carbon dioxide and ammonia, as in the following reaction.
CO(NH2)2(aq) + H2O(ℓ) ® CO2(g) + 2 NH3(g)
a. Without doing the calculation, would you expect the entropy for this reaction to be positive or negative? Why?
b. Calculate DrH° and DrS° for this reaction. DfH° = –319.2 kJ/mol; S° = 173.8 J/K•mol
c. Calculate DrG° for the reaction under standard conditions (25.0°C) using your answers from part (b). Is the reaction spontaneous or not at this temperature?
d. Determine the temperature at which the spontaneity of urea decomposition switches from spontaneous to non-spontaneous. Complete the following sentence, and show your mathematical work:
The decomposition of urea is spontaneous ABOVE/BELOW (choose one) _________°C
Solutions
gladiator answered 2 years agoRelated Solutions
Urea (NH2)2CO is prepared by reactign ammonia with carbon dioxide. The byproduct is water. 637.2g of...
Urea (NH2)2CO is prepared by reactign
ammonia with carbon dioxide. The byproduct is water. 637.2g of
ammonia are reacted with 787.3g of carbon dioxide.
A) write a balanced equation
B) Determine which of the reactants (ammonia or carbon dioxide)
is a limiting reactant. Show calculations to support your
choice
C) Which of the two reactants should you use to calculate the
theoretical yield (=the maximum amount possible) of urea. Explain
why
How many grams of urea [(NH2)2CO] must be added to 400 g of water to give...
How many grams of urea [(NH2)2CO] must be added to 400 g of
water to give a solution with a vapour pressure 2.50 mmHg less than
that of pure water at 30°C? (The vapour pressure of water at 30°C
is 31.8 mmHg.)
Hydrazine, N2H4, may react with oxygen to form nitrogen gas and water. N2H4(aq) + O2(g) ->...
Hydrazine, N2H4, may react with oxygen to form nitrogen gas and
water. N2H4(aq) + O2(g) -> N2(g) + 2H2O(l) If 3.65 g of N2H4
reacts and produces 0.950 L of N2, at 295 K and 1.00 atm, what is
the percent yield of the reaction?
Hydrazine, N2H4, may react with oxygen to form nitrogen gas and water. N2H4 (aq)+ O2 (g)...
Hydrazine, N2H4, may react with oxygen to form nitrogen gas and
water.
N2H4 (aq)+ O2 (g) ----> N2 (g) + 2H2O (l)
If 3.45 g of N2H4 reacts and produces 0.350 L of N2, at 295 K
and 1.00 atm, what is the percent yield of the reaction?
I got 13.0, and it said that it wasn't correct.
You prepare a solution by adding 20.0 g Urea [(NH2)2CO] to 125 g water at 25.0oC...
You prepare a solution by adding 20.0 g Urea
[(NH2)2CO] to 125 g water at
25.0oC & vapor pressure 23.76 torr.
The solution vapor pressure
is 22.67 torr. Calculate the molecular weight of urea.
XH2O = ________
moles H2O = ________
Xsolute = ________ moles
urea = ________ molar mass = ________
8.03 x 10^23 moleucles of oxygen react with excess nitrogen. what is the maximum number of...
8.03 x 10^23 moleucles of oxygen react with excess nitrogen.
what is the maximum number of grams of dinitrogen tetroxide that
can be produced?
42 grams of cyclohexane burns in excess air to form carbon
dioxide and water. How many grams of carbon dioxide and of water
vapor are produced?
part 1: Draw the Lewis structure for urea, H2N(CO)NH2. Add any any non-zero formal charges to...
part 1: Draw the Lewis structure for urea, H2N(CO)NH2. Add any
any non-zero formal charges to the atoms. Collect and Organize We
are to draw Lewis structures for urea. Analyze The hydrogen atoms
of urea must be terminal so as not to violate their duplet. Where
do the lone electron pairs go on urea? part 2 Draw the best Lewis
structure for the nitrite ion, NO2– .Collect and Organize We are to
draw the best Lewis structures for the nitrite...
Solid carbon can react with gaseous water to form carbon monoxide gas and hydrogen gas. The...
Solid carbon can react with gaseous water to form carbon
monoxide gas and hydrogen gas. The equilibrium constant for the
reaction at 700.0 K is Kp=1.60×10−3If a 1.55-L reaction vessel
initially contains 143 mbar of water at 700.0 K in contact with
excess solid carbon, find the percent by mass of hydrogen gas of
the gaseous reaction mixture at equilibrium.
Solid carbon can react with gaseous water to form carbon monoxide gas and hydrogen gas. The...
Solid carbon can react with gaseous water to form carbon
monoxide gas and hydrogen gas. The equilibrium constant for the
reaction at 700.0 K is Kp=1.60×10−3.
. If a 1.55-L reaction vessel initially contains 153 torr of
water at 700.0 K in contact with excess solid carbon, find the
percent by mass of hydrogen gas of the gaseous reaction mixture at
equilibrium.
mH2/mH2+mCO+mH2O =
Solid carbon can react with gaseous water to form carbon monoxide gas and hydrogen gas. The...
Solid carbon can react with gaseous water to form carbon
monoxide gas and hydrogen gas. The equilibrium constant for the
reaction at 700.0 K is Kp=1.60×10−3. If a 1.55-L reaction vessel
initially contains 247 torr of water at 700.0 K in contact with
excess solid carbon, find the percent by mass of hydrogen gas of
the gaseous reaction mixture at equilibrium.
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