p (kPa) 400 - 5) The figure shows a pV diagram for a cycle of a heat engine for which Q„= 25 J. What is the thermal efficiency of the engine? 200- (Hint: remember to convert cm³ to m³!) A) 17% B) 34% C) 8.5% D) 64% E) 40% V (cm³) 200 100
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- 1 mole of an ideal gas follows the cycle shown in the figure. 1-2 is isobaric process, 2-3 is adiabatic process and 3-1 is isochoric process. V1, P1 are given; V2 = 2V1, P2 = P1/3. Determine (according to P1, V1): a) Adiabatic coefficient g and molar specific heats Cv and Cp (from the process 2-3)? b) The heats from 1-2 and 3-1 processes? c) The thermal efficiency of the engine operating with this cycle (the cycle is CCW).b) Determine the amount of heat needed to completely transform 1 g of water at 15°C to steam at 115°C. (Obtain any relevant data that you need from the internet. Cite the source of that data in your answer)4. An ideal monatomic gas expands isothermally from 0.500 m³ to 1.25 m³ at a constant tempera- ture of 675 K. If the initial pressure is 1.00 ×10° Pa, 3 (a) find the work done on the gas, (b) find the thermal energy transfer Q, (c) determine the change in internal energy.
- The figure shows the pV-diagram for an isothermal expansion of 1.50 mol of an ideal gas, at a temperature of 15.0 deg C (a) What is the change in internal energy of the gas?Thermodynamics problem. What amount of heat is required to completely vaporize 2Kg of water at 20◦C?The picture shows a pV diagram for an ideal gas in which its pressure tripled from a to b when 804 J of heat was put into the gas. Work done on or by the gas between a and b= 0 W Delta U=804 J a) What is the temperature of the gas at point bb in terms of its temperature at a, Ta?
- 1) The nickel alloy materials using on the hot section of a jet engine can withstand temperatures of up to 1100 °C (2012 °F or 1373 K) if you add a ceramic coating that number goes up to 1300 °C (2372 °F or 1573 K). Assuming an ideal carnot efficiency in both cases, what is the increase of efficiency from no coating to coating. (Assume Ambient Temperature Exhaust gases to be 25 °C or 298 K)415.
- The state of an ideal gas is changed isothermally from position 1 to position 2 is shown below. What is the change in the internal energy of the gas during this process? ... P 1 T 2 V A) (A) AU = W B) (B) AU = Q (C) AU > 0 D (D) AU = 0 E) (E) AU < 010.-What is the heat of the isothermal process (from point B to point C)?Can you help me show the process in this problem? Thermodnamics At 25 °C 1 mol of an ideal gas is expanded isothermally from 2 to 20 dm3. Calculate ΔA and ΔG. Do the values depend on whether the process is reversible or irreversible? Ans: -5.71 kJ/mol and 5.71 kJ/mole respectively.