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xxxxxxxxxxxxxxxxxxxxyyyyyyyyyyyyyyyyyxxxxxxxxxyyyytttttttttttttttttttttttttttttttttttttttt Determine the entropy change of the systems given below and their surroundings. llllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
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Determine the entropy change of the systems given below and their surroundings. lllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
Discuss if the 2nd law is violated or not.
(a) A gas in a rigid tank is heated in a reversible process.
(b) An ideal gas with constant specific heats in a piston-cylinder device is cooled down in a reversible isobaric process.
(c) A gas in a piston-cylinder device is compressed in a reversible adiabatic process.
(d) A saturated liquid-vapor mixture in a piston-cylinder device releases heat in an irreversible isothermal process till the working fluid is a saturated liquid.
Solutions
Amanda K answered 3 weeks agoRelated Solutions
1. Using standard thermodynamic data at 298K, calculate the entropy change for the surroundings when 1.73...
1. Using standard thermodynamic data at 298K, calculate the
entropy change for the surroundings when 1.73 moles of Fe2O3(s)
react at standard conditions.
3Fe2O3(s) +
H2(g)2Fe3O4(s)
+ H2O(g)
2. Using standard thermodynamic data at 298K, calculate the entropy
change for the surroundings when
2.00 moles of CO(g) react at
standard conditions.
2CO(g) +
O2(g)2CO2(g)
3. Using standard thermodynamic data at 298K,
calculate the entropy change for the surroundings
when 2.35 moles of
H2O(l) react at standard
conditions.
2H2O(l)2H2(g)
+ O2(g)
TRUE OR FALSE *freezing water is possible only if the entropy of the surroundings increases ·...
TRUE OR FALSE
*freezing water is possible only if the entropy of the
surroundings increases
· Liquid water has a lower entropy than liquid benzene at 25°C
because of hydrogen bonding in water.
· Ice at 0°C has a higher entropy than liquid water at 0°C
because the density of ice is lower than the density of water.
· It is impossible to freeze ethanol because the change in
entropy of the system is negative.
· Binding a substrate to...
Consider the following processes and determine if the entropy change of the system is positive, negative,...
Consider the following processes
and determine if the entropy change of the system is positive,
negative, zero, or you cannot tell. Explain. (a) Liquid water is
frozen to form ice. (b) 1 mol of oxygen and 2 mol of hydrogen react
isothermally and completely to form 1 mol of water vapor. (c) 1 mol
of oxygen and 2 mol of hydrogen react adiabatically and completely
to form 1 mol of water vapor.
Calculate the change in Entropy
A 288 kg block of ice at 0∘C is placed in a large lake the temperature of the lake is just slightly higher than 0∘C and the ice melts very slowly.
i) what is the entropy change of ice
For 1 kg of liquid water, determine the entropy change of the universe when the water...
For 1 kg of liquid water, determine the entropy change of the
universe when the water is: Initially at 0 C, is heated to 50 C by
contact with a thermal reservoir at 50 C and then to 100 C with a
thermal reservoir at 100 C Assume Cp = 4.2 kJ/kg-K
Entropy permeates our universe. Five systems are listed below. Pick three systems from the list or...
Entropy permeates our universe. Five systems are listed below.
Pick three systems from the list or pick two systems from the list
and come up with a third system of your own. For each system you
choose, give an example of something that could happen to increase
the entropy of that system and explain why entropy increases.
Systems:
-An automobile
-The human body
-A building
-An ocean
-A solar system
Given the description of a change , select the final dispersion (disorder/entropy) state, A or B,...
Given the description of a change , select the final
dispersion (disorder/entropy) state, A or B, resulting from the
change.
A.
less dispersed (lower disorder/entropy)
B.
more dispersed (higher disorder/entropy)
melting ice cream
opening up a bottle of perfume
stacking of wooden blocks
popping a helium balloon
tidying up a bedroom
adding cream to a cup of coffee
making a smoothee
Determine whether the entropy increases or decreases in the given situations. a. A vapor that turned...
Determine whether the entropy increases or decreases
in the given situations.
a. A vapor that turned to solid
b. A vapor condenses to a liquid
c. A mole of vapor becomes solid
d. A liquid freezes
e. A solute dissolved in a solvent
Using the appropriate tables, determine the change in specific entropy between the specified states, in Btu/lb...
Using the appropriate tables, determine the change in specific
entropy between the specified states, in Btu/lb · °R.
(a) water, p1 = 10 lbf/in.2,
saturated vapor; p2 = 500 lbf/in.2,
T2 = 700°F.
(b) ammonia, p1 = 140 lbf/in.2,
T1 = 160°F; T2 = -10°F,
h2 = 100 Btu/lb.
(c) air as an ideal gas, T1 = 80°F,
p1 = 1 atm; T2 = 340°F,
p = 5 atm.
(d) oxygen as an ideal gas, T1 =
T2 = 520°R,...
drive the change in entropy for an ideal gas
drive the change in entropy for an ideal gas
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