Final answer:
The initial state of ammonia in a piston cylinder assembly varies depending on temperature and pressure, but can be one of the following states: saturated liquid, saturated vapor, superheated vapor, or compressed liquid.
Step-by-step explanation:
The initial state of the ammonia contained in a piston cylinder assembly can be any of the four options given depending on the temperature and pressure of the system: 1) Saturated liquid 2) Saturated vapor 3) Superheated vapor 4) Compressed liquid.
To determine the exact state of ammonia, we would need to know the specific conditions within the piston cylinder assembly. For ammonia, if it is at a temperature below its boiling point at atmospheric pressure (-33 °C), and is subject to pressure, it could exist as a compressed liquid.
On reaching its boiling point at atmospheric pressure, it would exist as a saturated liquid. If the temperature is maintained at the boiling point but the pressure is decreased, then it could change to a saturated vapor. If the temperature is increased beyond the boiling point while maintaining pressure higher than atmospheric pressure, ammonia would be in a state of superheated vapor.
Regarding the other questions mentioned, the number of moles in a specified volume of an ideal gas at certain conditions can be calculated using the Ideal Gas Law.
The final volume of gases after heat addition and compression can be found by applying the combined gas law and concepts from thermodynamics, such as adiabatic compression for gas B. The final temperatures will also depend on the heat capacities of the gases and can be calculated accordingly.
The value of added heat Q to gas A can be derived by using the first law of thermodynamics and considering the work done on or by the system.