Q2 - LEARNING ACTIVITY SHEET (LAS) Name: STEM 12 - General Physics 1 Section: Directions: Read each question carefully and choose the letter of the best answer. Encircle 6. Which of the following is NOT TRUE about the letter that corresponds to your answer. the various thermodynamic processes illustrated in the graphical representation below? 1. All the following describes the properties of an ideal gas except, Isobaric A. The force of attraction among the molecules are negligible Isuthermal Pressure B. The force of attraction is not negligible Adiabatic at all temperatures and pressures. echoric Volume C. Ideal gas law obeys all gas laws under A. If dP = 0, process is adiabatic. all conditions of temperature and B. If dT = 0, process is isothermal pressure. C. If dV =0, process is isochoric D. The volume occupied by the molecules D. If dP = 0, process is isobaric is negligible as compared to the total volume occupied by the gas. 7. During a cyclic process, a heat engine absorbs 500 J of heat from a hot 2. A cylinder contains 50.0 L of argon gas at reservoir, does work, and ejects 300 J of 18.4 atm and 127"C. How many moles of heat into the surroundings. Calculate the argon is in the cylinder? efficiency of the heat engine? A. 27.0 mol C. 29.0 mol A. 10% C. 30% B. 28.0 mol D. 30.0 mol B. 20% D. 40 % 3. What is constant in the thermodynamic 8. Which of the following is an example of process shown in the PV diagram below? reversible process? A. diffusion B. extension of springs C. heat transfer D. throttling A. pressure C. volume 9. The following states the Second Law of B. temperature D. work Thermodynamics, EXCEPT: A. The total entropy of an isolated system 4. A gas expands at a constant pressure of 5 can never decrease over time. atm from 4 L to 12 L. How much work is B. Processes that involve the transfer or done by the gas in Joules? conversion of heat energy are A. 3504 J C. 4350 J irreversible. B. 4053 J D. 5403 J C. Thermodynamic processes are subject to the principle of conservation of 5. Which of the following formula is TRUE energy. about the First Law of Thermodynamics? D. Energy can be changed from one form A. AU = Q + W to another, but it cannot be created or B. AU = W-Q destroyed. C. AU = Q-W D. AU = W-Q 10. Initially, 0.500 mole of a gas is confined to a volume of 0.500 m . When the barrier is removed, the gas expands to fill the new volume of 1.00 m . What is the change in entropy of the gas? A. 1.88 J/K C. 3.88 J/K B. 2.88 J/K D. 4.88 J/K