Solution Found!
Using the appropriate tables, determine the change in
Chapter 6, Problem 6.4(choose chapter or problem)
Using the appropriate tables, determine the change in specific entropy between the specified states, in Btu/lb ? 8R. Show the states on a sketch of the T–s diagram.
(a) water, \(p_{1}=10 \mathrm{\ lbf} / \mathrm{in} .\), saturated vapor; \(p_{2}=500 \mathrm{lbf} / \mathrm{in} .^{2}\), \(T_{2}=700^{\circ} \mathrm{F}\).
(b) ammonia,\(p_{1}=140 \mathrm{\ lbf} / \mathrm{in} .^{2}, \ T_{1}=160^{\circ} \mathrm{F} ; \ T_{2}=-10^{\circ} \mathrm{F}, \ h_{2}=590 \mathrm{\ Btu} / \mathrm{lb}\).
(c) air as an ideal gas, \(T_{1}=80^{\circ} \mathrm{F}, p_{1}=1 \mathrm{\ atm} ; T_{2}=340^{\circ} \mathrm{F}\), p = 5 atm.
(d) oxygen as an ideal gas, \(T_{1}=T_{2}=520^{\circ} \mathrm{R}, \ p_{1}=10 \mathrm{\ atm}, \ p_{2}=5 \mathrm{\ atm}\).
Questions & Answers
QUESTION:
Using the appropriate tables, determine the change in specific entropy between the specified states, in Btu/lb ? 8R. Show the states on a sketch of the T–s diagram.
(a) water, \(p_{1}=10 \mathrm{\ lbf} / \mathrm{in} .\), saturated vapor; \(p_{2}=500 \mathrm{lbf} / \mathrm{in} .^{2}\), \(T_{2}=700^{\circ} \mathrm{F}\).
(b) ammonia,\(p_{1}=140 \mathrm{\ lbf} / \mathrm{in} .^{2}, \ T_{1}=160^{\circ} \mathrm{F} ; \ T_{2}=-10^{\circ} \mathrm{F}, \ h_{2}=590 \mathrm{\ Btu} / \mathrm{lb}\).
(c) air as an ideal gas, \(T_{1}=80^{\circ} \mathrm{F}, p_{1}=1 \mathrm{\ atm} ; T_{2}=340^{\circ} \mathrm{F}\), p = 5 atm.
(d) oxygen as an ideal gas, \(T_{1}=T_{2}=520^{\circ} \mathrm{R}, \ p_{1}=10 \mathrm{\ atm}, \ p_{2}=5 \mathrm{\ atm}\).
ANSWER:Step 1 of 4
water, 
State 1: Table A-3E:
State 2: Table A-4E:
