From the given chemical equation we see that 43 kcal of
energy is needed for every 2 moles of NO. First let us calculate the moles of
NO with a molar mass of 30 g/mol.
moles NO = 112 g / (30 g/mol) = 3.73 mol
So the total heat absorbed is:
heat = (43 kcal / 2 mol) * 3.73 mol
<span>heat = 80.195 kcal</span>
The beginning of the Pre Cambrian is known as the Hadean eon. The planet was just born, and it was very very hot, and in fact molten. There were a lot of volcanic activities, and because of the way the solar system was created, there were still a lot of collisions between different bodies
Solution :
a). Applying the energy balance,
![$0=[mc(T_f-T_i)_{iron}] + [mc(T_f-T_i)_{water}]$](https://tex.z-dn.net/?f=%240%3D%5Bmc%28T_f-T_i%29_%7Biron%7D%5D%20%2B%20%5Bmc%28T_f-T_i%29_%7Bwater%7D%5D%24)
b). The entropy change of iron.
= -9.09 kJ-K
Entropy change of water :
= 10.76 kJ-K
So, the total entropy change during the process is :
= -9.09 + 10.76
= 1.67 kJ-K
c). Exergy of the combined system at initial state,
Therefore, energy of the combined system at the initial state is
= 63.94 -13.22
= 50.72 kJ
Similarly, Exergy of the combined system at initial state,
Thus, energy or the combined system at the final state is :
= 216.39 - 9677.95
= -9461.56 kJ
d). The wasted work
= 50.72 + 9461.56
= 9512.22 kJ
Answer:
The third one from the left–the graduated cylinder.
Explanation:
The laboratory apparatus that gives an <em>"accurate" </em>or <em>"precise" </em>measurement of a liquid's volume is the<em> graduated cylinder</em>. All you have to do is to pour the liquid into the cylinder and read its measurement using the calibrated scale.
The graduated cylinder comes in different sizes, which means the scale divisions will depend on its size. When reading the measurement, it is important to take note to read at the <u><em>bottom of the meniscus</em></u> because it gives the most accurate volume.
