Question
In: Chemistry
What is the energy (kcal) that must be removed to take 36.7 gram of water from...
What is the energy (kcal) that must be removed to take 36.7 gram of water from 100°C steam to 35°C liquid water?
Solutions
Expert Solution
100°C --------------------------> 35°C
(1) (2)
moles of water = 36.7 / 18.01
= 2.04
Q1 = n x delta H vap
= 2.04 x 40.7 x 10^3
= 82937 J
Q2 = m Cp dT
Q2 = 36.7 x 4.184 x (100 -35)
Q2 = 9981 J
Q = Q1 + Q2
Q = 82937 + 9981
Q = 92918 J
Q = 92918 / 4.184 cal
Q = 22208 cal
Q = 22.2 kcal
energy removed = 22.2 kcal
queen_honey_blossom answered 2 years agoRelated Solutions
How much energy must be removed to convert 9.73 g of water at 20.9 oC to...
How much energy must be removed to convert 9.73 g of water at
20.9 oC to an ice cube at -12.0 oC? Give your answer as a positive
value in Joules since only positive energy can be removed.. cwater
= 4.184 J/goC, cice = 2.03 J/goC, ΔHfus, water = 6.01 kJ/mol
Starting from rest, a 36.7-gram steel ball sinks into a vat of corn syrup. The thick...
Starting from rest, a 36.7-gram steel ball sinks into a vat of
corn syrup. The thick syrup exerts a viscous drag force that is
proportional to the ball\'s velocity:
Drag= -Cv
where C = 0.270 N·s/m is a constant related to the size and
composition of the ball as well as the viscosity of the syrup. Find
the rate at which gravitational energy is converted to thermal
energy once the ball reaches terminal velocity. (in W)
a) Determine the amount of heat per gram which must be removed to convert 110 OC...
a) Determine the amount of heat per gram which must be removed
to convert 110 OC steam (H2O(g)) into –10 OC ice(H2O(s)), then find
the total heat removed if there is 9.50 g of steam.
b) For acetic acid (CH3COOH, with one O bonded to an H), acetone
(CH3COCH3, with the O bonded only to a C), and carbon tetrachloride
(CCl4, see non polar molecules in section 12.10), determine the
predominant types of intermolecular attraction for the pure
liquids, and...
How much energy must be removed from a 125 g sample of benzene (C6H6) vapor at...
How much energy must be removed from a 125 g sample of benzene
(C6H6) vapor at 425.0 K to make it a solid at 200.0 K? Use the
following steps to get to your answer. You MUST show your work to
receive any credit. The following physical data for benzene may be
useful. The quiz will be due at the beginning of class on 2/17/16.
ΔHvap = 33.9 kJ/mol ΔHfus = 9.8 kJ/mol Cliq = 1.73 J/g°C Cgas = c...
How much energy must be removed from a 125 g sample of benzene (C6H6) vapor at...
How much energy must be removed from a 125 g sample of benzene
(C6H6) vapor at 425.0 K to make it a solid at 200.0 K? Use the
following steps to get to your answer. You MUST show your work to
receive any credit. The following physical data for benzene may be
useful. The quiz will be due at the beginning of class on 2/17/16.
ΔHvap = 33.9 kJ/mol ΔHfus = 9.8 kJ/mol Cliq = 1.73 J/g°C Cgas = c...
How much energy must be removed from a 125 g sample of benzene (C6H6) vapor at...
How much energy must be removed from a 125 g sample of benzene
(C6H6) vapor at 425.0 K to make it a solid at 200.0 K? Use the
following steps to get to your answer. ΔHvap = 33.9 kJ/mol ΔHfus =
9.8 kJ/mol Cliq = 1.73 J/g°C Cgas = 1.06 J/g°C Csol = 1.51 J/g°C
Tmelting = 279.0 K Tboiling = 353.0 K
1) Determine number of moles the sample contains.
___________________moles
2) How much energy must be removed to...
If you have 10.0 grams of water vapor at 120.0℃, then how much energy in the form of heat must be removed to cool the water vapor down to ice at -10.0℃?
If you have 10.0 grams of water vapor at 120.0℃, then how much energy in the form of heat must be removed to cool the water vapor down to ice at -10.0℃?
Hvap is 44.0 kJ/mol, Hfus is 6.01 kJ/mol, c for H2O(g) is 1.87 J/goC, c for H2O(l) is 4.18 J/goC, c for H2O(s) is 2.01 J/goC
Part II To calculate the percentage of calories (kcal) derived from each of the energy nutrients...
Part II To calculate the percentage of calories (kcal) derived
from each of the energy nutrients when the total number of calories
is known, divide the calories from each nutrient by the total
number of calories, and multiply by 100. (3 x 5 points each = 15
points) Example: A person consumed 600 kcal from CHO, 360 kcal from
Fat and 240 kcal from Pro. How many kcal did she consume? What
percentage of the total kcal in her diet...
Note that 1 calorie (4.2 J) is the energy needed to raise 1 gram of water...
Note that 1 calorie (4.2 J) is the energy needed to raise 1 gram
of water 1 degree, and recall that a food calorie is actually a
kilocalorie
Use whatever approximations you need, but state what they
are.
Show your work.
1) How much ice water must you drink and so heat up to equal the
energy in a chocolate glazed donut?
2) Will drinking ice water work as a weight loss strategy?
3) How about standing on a windy...
“[M]anagement take risks … but the processes that generate those … are somewhat removed from the...
“[M]anagement take risks … but the processes that generate those
… are somewhat removed from the classical processes of choosing
from alternative actions in terms of expected value”.
Discuss this statement in 500 words
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- This is all one question, thank you so much in advance. The Bigbee Bottling Company is...
- For Questions 1-3: consider the following code: public class A { private int number; protected String...
- You are tasked with assessing the health department’s intervention program in preventing recurrence of acute alcohol...
- Compare the MOSFET, JFET , and BJT and identify the reasons these devices behave differently. What...
- How would you use SAS Enterprise Miner to create a neural network model of your example?
- Explain the use of neural networking modeling in predictive analytics.
- Current Market Mix of Netflix, as detail as possible, please.
ADVERTISEMENT