procedures of doing calorimetry experiment
1. procedures of doing calorimetry experiment
I JUST EDITED MY ANSWER CAUSE I ACCIDENTALLY CLICK THE SEND BUTTON AND I CANT CHANGE IT INTO THE REAL ANSWER IM SORRY
2. Which statement is false regarding calorimetry?
Answer:
Which statement is false regarding calorimetry?
-Calorimetry is the process of measuring the amount of heat released or absorbed during a chemical reaction. By knowing the change in heat, it can be determined whether or not a reaction is exothermic (releases heat) or endothermic (absorbs heat).
3. what is the significance of calorimetry experiment?
A calorimeter is a device that burns compounds and measures the heat given off to determine the energy in that compound. This information can be used for determining calories of a food, how a reaction will occur, energy efficiency of a fuel, and many other uses.
4. In the calorimetry equation Q = mc∆T, what does the variable c stands for? *
Answer:
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Explanation:
patulong mga iiiiiidolo
5. what are the possible applications of calorimetry in the field of engineering?
Answer:
As a technique thermal analysis, has a wide range of applications which are not only limited to studying the thermal characterisation denaturation temperature and enthalpy of small and large drug molecules
6. In the bomb calorimetry simulation why is the energy released by the iron wire included in the calorimeter constant but deducted in the calculation of the heat of combustion of the substance?
Answer:
In a bomb calorimetry simulation, the energy released by the iron wire is included in the calorimeter constant because it represents the heat absorbed or released by the calorimeter itself. The calorimeter constant is used to account for any heat loss or gain that occurs within the calorimeter itself, and it is used to correct the measured heat of combustion of the substance being tested.
The energy released by the iron wire is deducted in the calculation of the heat of combustion of the substance because it is not directly related to the combustion of the substance. The heat of combustion is a measure of the energy released by the complete combustion of a substance, and it should only include the energy released by the substance itself. The energy released by the iron wire is not related to the combustion of the substance and therefore should not be included in the heat of combustion calculation.
In summary, the energy released by the iron wire is included in the calorimeter constant because it represents the heat absorbed or released by the calorimeter, but it is deducted in the calculation of the heat of combustion of the substance because it is not directly related to the combustion of the substance.
Explanation:
7. B. TRUE OR FALSEDirections: Read each statement below carefully. Write T if you think astatement is TRUE and F if the statement is FALSE. You can write your answeron your answer sheet.1. Sensors are utilized in the laboratory to transfer small quantities of liquid,usually down to 0.1 ul. They are most used in chemistry, biology, forensic,pharmaceutical, and drug discovery labs, among others.2. A meterstick or yardstick is either a straightedge or foldable ruler used tomeasure length. They are often made of wood or plastic, and often havemetal or plastic joints so that they can be folded together.3. The platform balance is a type of scale that uses counterweights on athree rider beams to counterbalance the sample in the pan.4. A calorimeter is an object used for calorimetry, or the process ofmeasuring the heat of chemical reactions or physical changes as well asheat capacity.5. A flask is a common container in most labs. It is used for mixing, stirring,and heating chemicals. It is generally a cylindrical container with flat bottom.Beakers come in a wide range of sizes, from one millilitre up to a severallitres.
1.true
2.true
3.false
4.true
5.true
8. What are the methods to perform a simple calorimetry in a cup?
Answer:
Measure the temperature of the acid with a thermometer. Add a measured volume of an alkali to the acid. Measure the temperature rise to calculate the energy change.
Answer:
MEASURE THE TEMPERATURE OF THE ACID WITH A THERMOMETER.
9. 17. It is the amount of energy needed to increase the temperature of one gram of the substance by 1°CA. Specific heatC. Mass of the sampleB. Change in temperature D. Heat energy of the reaction18. It is used to measure amounts of heat transferred to or from a substance.A. ThermodynamicsC. Specific heat capacityB. CalorimetryD. None of the above19. It is the amount of energy needed to increase the temperature of a substance or material by 1°CA. heat capacityC. calorimetryB. Specific heatD. None of the above20. What is the specific heat of Aluminum?A. 4.18 J/g. °CB. 0.450 J/g °C C. 0.897 J/g.°C D. 2.11 J/g.°C
Answer:
17. A
18. B
19. A
20. C
#CarryOnLearning
10. which of the following assumptions must be made in a coffee-cup calorimetry experiment? A. No heat is exchanged with the surroundings outside the calorimeter B. The amount of heat that is exchanged with the calorimeter itself is small enough to be ignored C. Both A and B D. None of the above.
Answer:
B. The amount of heat that is exchanged with the calorimeter itself is small enough to be ignored
Explanation:
Hope it helps. Please mark brain liest
11. The following substances undergo complete combustion in a bomb calorimetry. The calorimeter assembly has a heat capacity of 5.136 kJ/°C. In each case, what is the final temperature if the initial water temperature is at 22.4 °C?a. 0.3268 g caffeine, C8H10O2N4 ; heat of combustion = - 1014.2 kcal/molb. 1.35 ml of methyl ethyl ketone, C4H8O(l) (d = 0.805 g/ml); heat of combustion = -2444 kJ / mol methyl ethyl ketone.
a I think maybe b I don't know
12. Why is benzoic acid used in bomb calorimetry?
Benzoic acid (C6H5CO2H) is often used for this purpose because it is a crystalline solid that can be obtained in high purity. The combustion of benzoic acid in a bomb calorimeter releases 26.38 kJ of heat per gram (i.e., its ΔHcomb = −26.38 kJ/g).
#CARRYONLEARNING#BRAINLIEST Please :')13. Conduct an experiment to determine the specific heat, c, for unknown metal #1 (under solids tab). use the formula: c = (q)/(m)(t) where q = heat the metal lost; m = mass of the metal; and t = the change in temperature of the metal (metal and water end at same temperature value). (note: an assumption in this type of calorimetry problem is that in an ideal system the heat the metal lost = heat the water gained.) use a set up like you did in the experiment in #2 above to determine how much heat, q, the water gained and use this value for "q" of the metal, that is, the heat the metal lost. be sure to briefly describe your experiment, record all measurements made, and to show all calculations for determining the specific heat of the metal. from the specific heat obtained, identify the metal
Answer:
An irregular lump of an unknown metal has a measured density of 2.97 g/mL. The metal is heated to a temperature of 173 °C and placed in a graduated cylinder filled with 25.0 mL of water at 25.0 °C. After the system has reached thermal equilibrium, the volume in the cylinder is read at 34.0 mL, and the temperature is recorded as 40.6 °C. What is the specific heat of the unknown metal sample? Assume no heat is lost to the surroundings.
Chemistry
2 Answers
glerp · Truong-Son N.
Feb 4, 2018
c
=
0.46
J
g
⋅
°
C
Explanation:
Write down given information for both substances (mass, specific heat, change in temperature)
For Water :
m
=
25.0
g
c
=
4.181
J
g
⋅
°
C
T
i
n
i
t
i
a
l
=
25
°
C
T
f
i
n
a
l
=
40.6
°
C
Δ
T
=
T
f
i
n
a
l
−
T
i
n
i
t
i
a
l
=
40.6
°
C
−
25
°
C
=
15.6
°
C
For Metal :
m
=
D
⋅
V
=
2.97
g
m
L
⋅
9
m
L
=
26.73
g
c
=
?
T
i
n
i
t
i
a
l
=
173
°
C
T
f
i
n
a
l
=
40.6
°
C
Δ
T
=
T
f
i
n
a
l
−
T
i
n
i
t
i
a
l
=
40.6
°
C
−
173
°
C
=
−
132.4
°
C
Use the formula
Q
=
m
c
Δ
T
to find the change in energy in water.
Q
w
=
(
25.0
g
)
(
4.181
J
g
⋅
°
C
)
(
15.6
°
C
)
Q
w
=
1630.59
J
This (
Q
w
) is the amount of energy the water gained, so this means the metal lost the same amount(
−
Q
m
), according to the law of conservation of energy.
Q
w
=
−
Q
m
Rearrange the formula
Q
=
m
c
Δ
T
to find
c
of the metal.
c
=
Q
m
m
⋅
Δ
T
c
=
−
1630.59
J
(
26.73
g
)
(
−
132.4
°
C
)
c
=
0.46
J
g
⋅
°
C
Explanation:
hope s hlp
14. define calorimetry and its uses in chemistry.
Answer:
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Explanation:
★I HOPE IT HELPS★
15. what device is used in calorimetry?
Answer:
device for measuring the heat developed during a mechanical, electrical, or chemical reaction, and for calculating the heat capacity of materials. ... The material to be analyzed is deposited inside a steel reaction vessel called a bomb.
