Which statement about cellular respiration in plants and animals is true?
1 answer:
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Answer:
ΔH =
Explanation:
In a calorimeter, when there is a complete combustion within the calorimeter, the heat given off in the combustion is used to raise the thermal energy of the water and the calorimeter.
The heat transfer is represented by
=
where
= the internal heat gained by the whole calorimeter mass system, which is the water, as well as the calorimeter itself.
= the heat of combustion
Also, we know that the total heat change of the any system is
ΔH = ΔQ + ΔW
where
ΔH = the total heat absorbed by the system
ΔQ = the internal heat absorbed by the system which in this case is
ΔW = work done on the system due to a change in volume. Since the volume of the calorimeter system does not change, then ΔW = 0
substituting into the heat change equation
ΔH = + 0
==> ΔH =
Answer:
see the pic for the answer
Explanation:
It is known that at the equivalence point,
Equivalent of acid = equivalent of base ......... (A)
and, Equivalent =
Therefore, equivalent of acid is calculated as follows.
Equivalent of acid = .......... (1)
Equivalent of base = ............ (2)
Hence, using equation (A) we will calculate the concentration as follows.
M = 0.16 M
Thus, we can conclude that concentration of the unknown weak acid solution 0.16 M.