CHAPTER 19 An auditorium has dimensions 32 m x 12m x 25 m. How many molecules of air fill the auditorium at 42C and pressure of 100 kPa? Assume air is an ideal gas. Note: Write the unit: molecules QUESTION CHAPTER 19 A spherical metalic ball has a diameter of 29 cm at 22 C. How much increase in its volume (in cm) if it is heated to 40C? Consider c =25 10-6c) QUESTIONS CHAPTER 20 An iron piece of mass m - 4.5 kg initially at 511 C 1 droped into an isolated bucket containing 26 kg of water at 18c. What is the final temperature in C) of the water piece system? Ignore the heat capacity of the container water - 4185/kg C Ciron - 448J/kg. c (Note: write the unit of answer Conly capital QUESTIONS CHAPTER 21 Air at 20C in the cylinder of a diesel engine is compressed from an initial pressure of 2.3 atm and volume of 657 cm.te a volume of 270 cm. Asume air behavet at an ideal gas with gomma v1.4) and the compression is adiabatic with changing in temperature. Find the final pressure of the air Hint: for adiabatic process of an ideal gas, we can use PV-PV Note: Totm 105x10