PHYSICS 2140 Discussion 1 worksheet (2) - SOLUTIONS _ Wayne State University PHYSICS 2140

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Physics 2140 Discussion 1 worksheet NAME ________________________________________________________ Learning outcomes: • Analyze the relationships between thermal energy, kinetic energy, speed, and... temperature of a gas • Predict the pressure, volume, temperature, amount, and thermal energy of ideal gases and how these quantities change in a thermodynamic process • Analyze qualitatively and quantitatively the internal energy of a system and changes in internal energy due to energy transfers (work and heat, enthalpy) using the basic energy model and the first law of thermodynamics 1. There are two containers of equal volumes, each filled with a different gas. Both containers have the same number of moles of gas and are at the same temperature. The molecules of gas in container 1 are four times more massive than the molecules of gas in container 2. a. State which container, 1 or 2, has the larger value of the following quantities, or, if they are equal, state that they are equal. Explain your reasoning. i. Pressure ii. “Average” (rms) speed of gas molecules iii. Average kinetic energy of gas molecules iv. Thermal energy 2. A container of 1.2 $%& of an ideal gas has a volume of 5.4 ) = 5.4 × 10−3 $3. The gas is at an initial temperature of /50 0. a. What is the initial pressure of the gas? [Show More]

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