A rigid, insulated tank initially contains 0.5 kg of carbon dioxide (CO2) gas at an absolute pressure of 150 kPa and a temperature of 20 C (State 1). The gas is stirred by a paddle wheel until the absolute pressure of the gas increases to 200 kPa (State 2). Assume that the surrounding pressure is 1 bar and temperature is 20 C. Consider variable specific heats for carbon dioxide. Do not interpolate; use the closest values.

Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise