A Carnot engine uses a high temperature reservoir with temperature 800 K and efficiency 40%. In order to increase the efficiency to 50%, the temperature of the high reservoir must be increased to
T1 = 800 K
Efficiency of Carnot engine that operated with high temperature 400 K is 40 %, if the high temperature increase to 640 K. Calculate the efficiency!
T1 = 400 K
T1 = 640 K
Look at to a gas P-V graphic below :
The ideal gas during A-B process. Gas work during AB process is
Much work is done 1mol of gas if the gas isotermic expansion of 2 liters volume at pressures up 20.105 Nm-2 to 20 liters (the gas temperature 270C) is
On the graph below calculate the work done by machine!
Q1= 2100 J
T1 = 700K
T2 = 400 K
An ideal refrigerator using 275 watts of electrical power and be able to remove the heat out of the machine at a rate of 850 joules per second. If the temperature inside the refrigerator 370C, determine the temperature outside the refrigerator!
W = 275 Watt
Q1 = 850 Joule
T2 = 370C = 3100K
T1 = .?
A Carnot engine uses a high temperature reservoir with temperature 300 K have efficiency 40%. If the high temperature reservoir have temperature 360 K, the efficiency become.
Gases with internal energy 60 J absorb a heat 90 J from environment. If in the same time, system get work 150 J. Determine the internal energy at last!
U1 = 60 J
Q = 90 J
W = -150 J
U2 = ?
U = Q W
U2 U1 = Q W
U2 60 = 90 (-150)
U2 = 240 + 60
U2 = 300 J
If R = 8,31 J/mol.K, so heat capacity of 4 mol nitrogen gases in constant pressure and low temperature is.
Heat capacity of 5 mol monoatomic gases in constant volume is.(R = 8,31 J/mol.K)