Answer:
The change in entropy of gas is ![\Delta S= nC_{P}ln3](https://tex.z-dn.net/?f=%5CDelta%20S%3D%20nC_%7BP%7Dln3)
Explanation:
n= Number of moles of gas
Change in entropy of gas = ![ds= \int \frac{dQ}{T}](https://tex.z-dn.net/?f=ds%3D%20%5Cint%20%5Cfrac%7BdQ%7D%7BT%7D)
![dQ= nC_{p}dT](https://tex.z-dn.net/?f=dQ%3D%20nC_%7Bp%7DdT)
From the given,
![V_{i}=V](https://tex.z-dn.net/?f=V_%7Bi%7D%3DV)
![V_{f}=3V](https://tex.z-dn.net/?f=V_%7Bf%7D%3D3V)
Let "T" be the initial temperature.
![\frac {V_{i}}{T_{i}}=\frac {V_{f}}{T_{f}}](https://tex.z-dn.net/?f=%5Cfrac%20%7BV_%7Bi%7D%7D%7BT_%7Bi%7D%7D%3D%5Cfrac%20%7BV_%7Bf%7D%7D%7BT_%7Bf%7D%7D)
![\frac {V}{T}=\frac {3V}{T_{f}}](https://tex.z-dn.net/?f=%5Cfrac%20%7BV%7D%7BT%7D%3D%5Cfrac%20%7B3V%7D%7BT_%7Bf%7D%7D)
![{T_{f}} = 3T](https://tex.z-dn.net/?f=%7BT_%7Bf%7D%7D%20%3D%203T)
![\int ds = \int ^{T_{f}}_{T_{i}} \frac{nC_{P}dT}{T}](https://tex.z-dn.net/?f=%5Cint%20ds%20%3D%20%5Cint%20%5E%7BT_%7Bf%7D%7D_%7BT_%7Bi%7D%7D%20%5Cfrac%7BnC_%7BP%7DdT%7D%7BT%7D)
![\Delta S = nC_{p}ln(\frac{T_{f}}{T_{i}})](https://tex.z-dn.net/?f=%5CDelta%20S%20%3D%20nC_%7Bp%7Dln%28%5Cfrac%7BT_%7Bf%7D%7D%7BT_%7Bi%7D%7D%29)
![\Delta S = nC_{p}ln3](https://tex.z-dn.net/?f=%5CDelta%20S%20%3D%20nC_%7Bp%7Dln3)
Therefore, The change in entropy of gas is ![\Delta S= nC_{P}ln3](https://tex.z-dn.net/?f=%5CDelta%20S%3D%20nC_%7BP%7Dln3)
What are " of the following"?
Answer:
they use echos to communicate
Explanation: dolphins make echos in order to signal there partners, and others in there pod. or they can use it to signal for prey, or signal that they are in trouble.
Answer:
2K3PO4(aq) + 3MgCl2(aq) → Mg3(PO4)2(s) + 6KCl(aq)
Explanation:
K3PO4(aq) + MgCl2(aq)→ Mg3(PO4)2(s) + KCl(aq) (unbalanced)
2K3PO4(aq) + 3MgCl2(aq) → Mg3(PO4)2(s) + 6KCl(aq)
Reactants: Products:
K: 3x2=6 K: 1x6=6
P: 1x2=2 P: 1x2=2
O: 4x2=8 O: 4x2=8
Mg: 1x3=3 Mg: 3x1=3
Cl: 2x3=6 Cl: 1x6=6
Therefore the equation is balanced. Hope this helps.
Answer:
D
Explanation:
The greater the distance apart, the lesser the gravitational force between the objects