One of the most important points on a phase diagram is the triple point, where g

Question

One of the most important points on a phase diagram is the triple point, where gas, liquid, and solid phases all can exist at once. What are the coordinates ( Ttriple, ptriple) of the triple point of ammonia in the diagram?

Express your answer as an ordered pair. Determine the temperature to the nearest 5 K and the pressure to one significant digit.

Part A

What is the rate of heat input to the plant?

Part B

The plant burns anthracite coal, which has a heat of combustion of 2.65×107J/kg. How much coal does the plant use per day, if it operates continuously?

Part C

At what rate is heat ejected into the cool reservoir, which is the nearby river?

Part D

The river's temperature is 18.0 C before it reaches the power plant and 18.6 C after it has received the plant's waste heat. Calculate the river's flow rate, in cubic meters per second.

Part E

By how much does the river's entropy increase each second?

Explanation / Answer

since figure is not given

you can find coordinates of triple point like this

P-triple point = move horizontally from triple point to the y-axis

T-triple point= move vertically down from triple point to x-axis

PartA

energy= m*c*delT

rate of heat input = energy /time

Part B b

thermal efficiency = not given .let it be 'n'

power = notr given = W

efficiency(n) = W/(m*heat of combustion )

m= mass of coal uses per day

m = W/ (n *heat of combustion)

heat of combustion = 2.65 *10^7 J/kg

substitute all values and find m

Part C

heat ejected , Qloss

Qin= W/n

Qloss = Qin - W

find Qloss by substitutng all values Qin and W

Part D

Qloss = Qw(after recieving the waste)

Qloss = mw *c *delT

find mw

mw = Qloss/(c*delT)

Qloss found in part C

so find mw

PartE

delS= mw *c * ln(Tf/Ti)

substitute all values and find delS

Note : data given is partially incomplete ..value of efficiency should be given and power should be given..so had written all the possible formulas.

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