Question

Article name: Thermodynamic

Q1- Answers Multiple Choice Questions (MCQs): 1. the temperature is constant, internal energy al changes with change in changes with change in changes with change in both and does not change with change in por 2. The equation du vet holds good for any process for a pas, even when the volume changes b) for other substances it is true only when the volume is constant c) both of the mentioned none of the mentioned 3.A mass of 1 kg of aircontained in a cylinder 1000K, 15 MPa.expands in a revenible sothermal process to a volume 10 times larger. Calele het die during the process. a) 460.84 b) 560.84 d) 760. 4. O amount of heat is transferred to a system, which of the following come? bJQ<0 Q0 Cannot say 5.10 of work is done on a steady state system, what is the heat supplied to them? a)-303 b103 40 Q2- Answers Multiple Choice Questions (MCQs): 1. Which of the following is constant in a closed system? b) Mass c) Temperature Momentum 2. The human body is an example of which of the following a) Closed System b) Open System c) Isolated System d) None of the mentioned 3. Total energy of the universe is always Increasing Decreasing cConstant Carnot say 4. What is the energy balance of a cloedstem? Matter in the system is constant bi Energy in the item is constant c) Neither energy nor matter is constant Both of energy and matter are constant 5. Efficiency of a heat engine is defined as a) het network input b) total heat input workout

Answer 1

in i> if temp is constant, internal with energy changes ved does not change change and y in p becouse internal only function of Temperature ideal gas. with energy is a> holds good ood for Las The equation, do. Cudt any process for an ideal the volume changes gas , even when 3> Given, mass of air= 1 kg Temp = T = 10ook PL = los MPa expand in reversible iso mermal process. Volume V2 - 10.V1 AQ?? For isothermal processo. A U20 from DO 40+w = Wiso = MRT In Uz 1ooo Hz ART in 24 h x 8.314 x 10 0 OxIn 1041 28.96 Az W > 661039.1 J = = 661 kJ (C) is corect 47 Q option amount heat transfer to a system Q>o 5o 105 of work on a steady state system, ex LOJ

Q2 i> which of following is constant in Closed system energy 27 example of the human body is open system universe is always 37 Total energy of les constant for is energy 47 what balance close system 57 ats Both of energy and matter is const efficiency of heat engine defines as Total work output nz total heat input z