This question requires the use of the extracts from the tables of thermodynamic properties supplied. Ammonia, NH3, was once a commonly used refrigerant. In a particular (very old) refrigeration plant, ammonia has a pressure of 2.9 bar and a temperature of 40 °C. What would be the specific enthalpy of the ammonia under these conditions. О а. 1622 kJ/kg O b. 1552 kJ/kg О с. 1665 kJ/kg O d. 1433 kJ/kg e. 135 kJ/kg

This question requires the use of the extracts from the tables of thermodynamic properties supplied. Dry saturated steam at a temperature of 25°C is cooled isentropically such that its temperature falls to 15°C. What is the dryness fraction after the cooling process? а. 0.97 O b. 0.77 O c. 0.81 O d. 0.85 е. 0.93

Handwritten solution required this is a basic thermodynamics question

Q6: The atmospheric air at 750 mm of Hg has 34° C dry bulb temperature and 19° C wet bulb temperature. Using psychrometric chart, find (a) partial pressure of vapor, (b) saturation pressure corresponding to 34° C, and (c) volume of air per kg of dry air. [Ans. 8.5 mm of Hg: 39.9 mm of Hg; 0.088 m3/kg of dry air]

This question requires the use of the extracts from the tables of thermodynamic properties supplied. Dry saturated steam at a temperature of 25°C is cooled isentropically such that its temperature falls to 15°C. What is the dryness fraction after the cooling process? а. 0.93 О ь. 0.85 O c. 0.81 d. 0.97 е. 0.77

2.00 moles of nitrogen gas at 25.0 °C, confined within a cylinder by a piston maintaining a constant pressure of 1.00 atm, is heated with 3.90 kJ of energy. Assume all the energy is used to do work of expansion of the gas at 1.00 atm. What will be the final temperature (in °C) of the gas? Recall ∆H = ∆E + P∆V and watch your units!

An air-conditioning system made up of a compressor and heat exchanger is shown in the figure below. This system is operating at steady-state with air flowing through the heat exchanger while the refrigerant first flows through a compressor before entering the heat exchanger. The refrigerant and air do not mix in the heat exchanger. Two control volumes are defined in the figure and both of these control volumes are to be used to answer the questions from this problem. Rotating Shaft 3 Compressor Refrigerant 12 I Control volume B wwwwwww wwwww Heat Exchanger 1 1 I 5 Air Control _' volume A The air enters the heat exchanger (inlet marked 1 in the figure) at a temperature of -13 °C, volumetric flow rate of 0.03 m³/min, and pressure of 101 kPa. Upon exiting the heat exchanger, the air is at a temperature of 42 °C (outlet marked 2 in the figure). The air can be modeled as an ideal gas with gas constant of 287 J/kg.K. The refrigerant enters the compressor (inlet marked 3 in the figure) at a…

What is the relative amount of each alpha for a 40% wt% Sn-60% Pb at 150 degrees. Express your answer as a percentage (%) T(°C) 300+ 200+ 100+ Answer: 0 α L+a 18.3 20 Pb-Sn system L (liquid) 183°C 61.9 a + ß 60 C, wt% Sn 7+BB 97.8 80 100