Each line of the following table gives data for a process of a closed system. Each entry has the same energy unit. Determine the missing entries. Write down the procedure for each part.
Process | Q | W | E1 | E2 | Δ E |
---|---|---|---|---|---|
A | +50 | ? | -20 | ? | +70 |
B | ? | +20 | ? | +50 | +30 |
C | ? | -60 | +40 | +60 | ? |
D | -40 | ? | +50 | ? | 0 |
E | +50 | +150 | ? | -80 | ? |
Process.A:
Apply energy balance,
$$ \begin{aligned} &Q=W+\Delta E \\ &50=W+70 \\ &W=-20 \end{aligned} $$
Find the value of \(E_{2}\).
$$ \begin{aligned} &\Delta E=E_{2}-E_{1} \\ &70=E_{2}-(-20) \\ &E_{1}=50 \end{aligned} $$
Process. B:
Apply energy balance,
$$ \begin{aligned} &Q=W+\Delta E \\ &Q=20+30 \\ &Q=50 \end{aligned} $$
Find the value of \(E_{1}\)
$$ \begin{aligned} &\Delta E=E_{2}-E_{1} \\ &30=50-E_{1} \\ &E_{1}=20 \end{aligned} $$
Process C
Find the value of \(\Delta E\).
$$ \begin{aligned} \Delta E &=E_{2}-E_{1} \\ &=60-40 \\ \Delta E &=20 \end{aligned} $$
Apply energy equation.
$$ \begin{aligned} &Q=W+\Delta E \\ &Q=-60+20 \\ &Q=-40 \end{aligned} $$
Process D:
Find the value of \(E_{2}\).
$$ \begin{aligned} &\Delta E=E_{2}-E_{1} \\ &0=E_{2}-50 \\ &E_{2}=50 \end{aligned} $$
A pply energy equation.
$$ \begin{aligned} &Q=W+\Delta E \\ &-40=W+0 \\ &W=-40 \end{aligned} $$
Process E:
Apply cnergy equation.
$$ \begin{aligned} &Q=W+\Delta E \\ &50=150+\Delta E \\ &\Delta E=-100 \end{aligned} $$
Find the value of \(E_{1}\).
$$ \begin{aligned} &\Delta E=E_{2}-E \\ &-100=-80-E_{1} \\ &E_{1}=20 \end{aligned} $$
Each line of the following table gives data for a process of a closed system. Each...
Each line of the following table gives data, in Btu, for a process of a closed system. Determine the missing table entries, in Btu.
thermodynamics 1 Normal 1 No Spac... Heading 1 Heading 2 Paragraph Styles For each of the following cases; find the missing values for each process using first law for that process. (Q, W, E are given in kJ). a) Q=-40; W=?; E1=?; E2=60; AE=? b) Q=?; W= - 90; E1=?; E2=50; AE=0 c) Q=50; W=?; E1=20; E2=?; QE= - 100 |
1. In the compression stroke of a gas engine, the work done on the gas by the piston is 70 kJ/kg, and the heat rejected to the cooling water is 42 kJ/kg. Calculate lthe change of specific internal energy, stating whether it is a gain or a loss. 2. A closed system undergoes 5 separate processes. These processes are summarised in the following table Q (kJ) E, (kJ) 20 50 Process E, (kJ) AE (k 50 20 -20 80 90...
The table below shows some of the expenditure amounts in the economy of Arkinia. The MPC, the MTR, and the MPM are all constant, as are the values of the three injections. a. Complete the table below. Y T YD C S I G X IM XN AE 0 50 180 50 100 60 -5 50 180 50 30 200 60 130 10 50 180 50 300 80 195 50 180 50 40 400 100 40 50 180 50 50...
Q20 (1 point). The table below shows the demand and supply schedules for peanuts. Suppose the government imposes a 12 cent tax on buyers and a 48 cent tax on sellers. What is the price paid by each consumer? O 4.50 O 4.60 O 4.70 0 4.80 р Q Demanded Q Supplied 4.00 140 20 4.10 130 40 4.20 120 60 4.30 110 80 4.40 100 100 4.50 90 120 4.60 80 140 70 160 4.70 4.80 60 180 4.90...
Unit Cost, Ending Work-in-Process Inventory, Journal Entries During August, Skyler Company worked on three jobs. Data relating to these three jobs follow: Job 39 Job 40 Job 41 Units in each order 60 100 80 Units sold — 100 — Materials requisitioned $700 $690 $800 Direct labor hours 360 400 200 Direct labor cost $1,944 $2,440 $1,220 Overhead is assigned on the basis of direct labor hours at a rate of $2.20 per direct labor hour. During August, Jobs 39...
please help... ignore the written work 1) Which compound gives the following spectra? For the 'H-NMR assign all signals. Interpret mol peak and base peak in the mass spectrum if a mole peak exists. Assign at least two "c signals. How does the IR spectrum support your findings? (12 pts.) s, 4 H s, 3 H t, 3 H q, 2h s, 1 H 2 1 6 5 4 7 8 11 10 ppm esce 100- 80 40 20 150...
The following table shows the market demand and supply for soybeans. TABLE DATA: Quantity SuPplied (Bushels per Year) Quantity Demanded (Bushels per Year) Price ($ per Bushel) 10 120 0 110 9 10 8 20 100 7 30 90 6 40 80 5 50 70 4 60 60 3 70 50 2 80 40 1 90 30 0 100 20 Instructions: Enter your responses as a whole number a. What is the equilibrium price? $ per bushel b. What is...
5. Input Inflexlbility and cost minimization The following lsoquants depict the technologically efficient bundles of labor and capital for producing 100 and units of output 5. Input inflexibility and cost minimization Aa Aa The following isoquants depict the technologically efficient bundles of labor and capital for producing 100 and 150 units of output (labeled q 100, and q150, respectively). Suppose the firm is initially using the cost-minimizing bundle of labor and capital for producing 100 units of output, represented by...
5. Input Inflexlbility and cost minimization The following lsoquants depict the technologically efficient bundles of labor and capital for producing 100 and units of output choose, Capital is Flexible, fixed at 10, fixed at 15, fixed at 20. 5. Input inflexibility and cost minimization Aa Aa The following isoquants depict the technologically efficient bundles of labor and capital for producing 100 and 150 units of output (labeled q 100, and q150, respectively). Suppose the firm is initially using the cost-minimizing...