A certain gas has cp = 0.913 and cv = 0.653 kJ/kg.K. Find the molecular weight and the gas constant R of the gas. A constant volume chamber of 0.3 m3 capacity contains 1 kg of air at 5°C. Heat is transferred to the air until the temperature is 100°C. Find the work done, the heat transferred, and the changes in internal energy, enthalpy and entropy.

3 Having just invented a new type of calorimeter, Dr. Campbell needs to determine the heat capacity of the calorimeter.  She carries out the following experiment to do this: She puts 20.0 grams of water in her empty calorimeter and it is allowed to stabilize at a temperature of 25.0ºC.  She then adds 35.586 grams of water at a temperature of 83ºC to the calorimeter.  After a few minutes the final temperature of the calorimeter stabilizes at 47.8ºC.   Based on this experiment, what is the heat capacity of her calorimeter assuming units of J/ºC? Enter your answer with at least 3 sig figs.

The figure below is the basic plot of pressure vs. volume for the Dual Standard Cycle. Constant pressure heat addition 3 4 = constant Нeat IN Adiabatic expansion Heat OUT (Constant volume heat rejection) Constant volume heat addition Adiabatic compression Volume (V) Using the Dual Air Standard Cycle and the following data: Assume constant properties of air. R= 287 J/kgK; Cp = 1005 J/kgK; Cv = 718 J/kgK;y = 1.4 Cycle compression ratio = 11 (v1/v2) Air conditions prior to compression: Pressure = 1.6 bar; Temperature = 298K Heat added at constant volume = 290000 J/kg Heat added at constant pressure = 579000 J/kg a) Calculate the pressure at the end of the compression process. P2 = bar Pressure (P) LO

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