246 Thermodynamics Demystifi ed

Power Work and Heat Pressure Volume

1 hp = 550 ft ⋅ lbf/sec

1 hp = 2545 Btu/hr

1 hp = 0.7455 kW

1 W = 1 J/s

1 W = 3.412 Btu/hr

1 kW = 1.341 hp

1 ton = 12 000 Btu/hr

1 ton = 3.517 kW

1 hp = 550 ft ⋅ lbf/sec

1 ft ⋅ lbf = 1.356 J

1 cal = 3.088 ft ⋅ lbf

1 cal = 0.003968 Btu

1 Btu = 1055 J

1 Btu = 0.2930 Wh

1 Btu = 778 ft⋅lbf

1 kWh = 3412 Btu

1 therm = 105 Btu

1 quad = 1015 Btu

1 psi = 2.036 in Hg

1 psi = 27.7 in H2O

1 atm = 29.92 in Hg

1 atm = 33.93 ft H2O

1 atm =101.3 kPa

1 atm = 1.0133 bar

1 atm = 14.7 psi

1 in Hg = 0.4912 psi

1 ft H2O = 0.4331 psi

1 psi = 6.895 kPa

1 kPa = 0.145 psi

1 ft3 = 7.481 gal (U.S.)

1 ft3 = 0.02832 m3

1 gal (U.S.) = 231 in3

1 gal (Brit.) = 1.2 gal

1 m3 = l000 L

1 L = 0.03531 ft3

1 L = 0.2642 gal

1 m3 = 264.2 gal

1 m3 = 35.31 ft3

1 ft3 = 28.32 L

1 in3 = 16.387 cm3