Answer:
D?
Explanation:
I think D hmm is the answer if I am wrong pls anyone or someone type the right answer but for me is d
Answer:
0.1546 gram/mL
Explanation:
9.65lb/ft^3 in gram/mL => 0.1546 gram/mL
1ft^3 in mL => 28,316.8466 mL
1lb in gram => 453.5924 gram
9.65*453.59 gram/28316.84 mL => 0.1546 gram/mL
Answer:
Oil has the smaller heat capacity. The effectiveness of the heat exchanger is 0.80.
Explanation:
Part 1:
In order to know which fluid has the smaller heat capacity we need to consider the heat equation below:
Q = CΔT, where Q is the heat exchanged, C is the heat capacity and ΔT is the variation in temperature.
As the heat exchange is the same for both fluids, the smaller the temperature variation, the smaller the heat capacity.
Water: ΔT = 120 °F
Oil: ΔT = 80 °F
Therefore, oil is the fluid with the smallest heat capacity.
Part 2:
The effectiveness of a counter-flow heat exchanger is given by the equation bellow:
![E = \frac{Th1 - Th2}{Th1 - Tc1} \\](https://tex.z-dn.net/?f=E%20%3D%20%5Cfrac%7BTh1%20-%20Th2%7D%7BTh1%20-%20Tc1%7D%20%5C%5C)
Th1: initial temperature of the hot fluid
Th2: final temperature of the hot
Tc1: initial temperature of the cold fluid
![E = \frac{220 - 100}{220 - 70} \\E = 0.8](https://tex.z-dn.net/?f=E%20%3D%20%5Cfrac%7B220%20-%20100%7D%7B220%20-%2070%7D%20%5C%5CE%20%3D%200.8)
Generally there are two kinds of bleaching agents, notably chlorine (and many chlorine compounds such as sodium hypochlorite) and peroxygen bleaching agents (such as hydrogen peroxide). This isn't to say there aren't others, because there are, such as ammonia. (Note, mixing traditional bleaches and ammonia is very dangerous)
Answer:
Vapor pressure of the solution is 22.9 torr at 25°C
Explanation:
When a non volatile solute is added to a pure solvent, the vapour pressure of the mixture decrease regard to the pure solvent following the equation (Raoult's law):
![P_{solution}=X_{solvent}.P^0_{solvent}](https://tex.z-dn.net/?f=P_%7Bsolution%7D%3DX_%7Bsolvent%7D.P%5E0_%7Bsolvent%7D)
Where vapour pressure of the pure solvent (Water) is 23.8torr at 25°C.
Mole fraction of water is the ratio between moles of water and total moles in solution. The solution has a mole fraction of water of:
![X_{water}=\frac{8.0Moles_{water}}{0.30mol_{Na_2SO_4}+8.0mol_{water}} = 0.9639](https://tex.z-dn.net/?f=X_%7Bwater%7D%3D%5Cfrac%7B8.0Moles_%7Bwater%7D%7D%7B0.30mol_%7BNa_2SO_4%7D%2B8.0mol_%7Bwater%7D%7D%20%3D%200.9639)
Replacing in Raoult's law:
![P_{solution}=0.9639*23.8torr](https://tex.z-dn.net/?f=P_%7Bsolution%7D%3D0.9639%2A23.8torr)
<h3>Vapor pressure of the solution is 22.9 torr at 25°C</h3>