At 15°C water temperature, vapor pressure of water is 1.70 kN/m“. The saturation vapor pressure at that temperature of water is nearly: [Given: specific weight of Mercury = 845.52 lb/ft') 13. %3D (A)0.504 inches of Hg (B) 1.450 inches of Hg (C) 0.755 inches of Hg (D) None of the above

An air compressor used for spraying paint has a tank of capacity 0.40 m that contains air at 27°C and 6.0 atm. How many moles of air does the tank hold? (A) 56.9 mol (B) 97.5 mol (c) 75.1 mol 88.4 mol

Figure P2.33 shows a portion of the H,O-NaCl phase diagram. 10 Liquid (brine) Salt Ice + -10 F liquid (brine) liquid (brine) -20 Ice + salt -30 NaCI 10 20 30 H2O 100 90 80 70 FIGURE P2.33 Composition, weight % a. Using the diagram, briefly explain how spreading salt on ice causes the ice to melt. Show numerical examples in your discussion. b. At a salt composition of 10%, what is the temperature at which ice will start melting? c. What is the eutectic temperature of the ice and salt combination? Temperature, °C

a) Glycerine at 20°C has a specific gravity of 1.263. Compute its density (p) and specific weight (y). b) A pint of water weighs 1.041 lb. Find its mass.

Civil

3 pts Determine the specific volume of a certain gas if the gage pressure is 5 kPa at 25°C and the gas constant is 287 J/kg-K

41)

A liquid has an absolute viscosity of 2.231025 Ib-s/ft?. It weighs 45 Ib/ft. What is its kinematic viscosity?