Asteel pipe carrying engine oil at 250°f (n = 3.2 btu/h-ft-of) loses heat to the outside air at 77 °f with h = 7.9 btu/h- ft. f. the pipe has a 6.0-inch inner diameter and is made of 1/4-inch thick steel (k = 36 btu/h-ft-f), and is 85 ft long. it is coated with a 1/2-inch thick tube of foam insulation (k = 0.013 btu/h-ft-f) to reduce heat loss. a. what is the total rate of heat loss (a) from the oil to the air across the insulated pipe? b. what is the temperature of the outer surface of the steel pipe that touches the foam? c. what would the heat loss be if there were no insulation?
Answers: 3
Chemistry, 22.06.2019 13:30, kassandrarosario1115
How many protons, electrons, and neutrons are in each of the following isotopes? a. zirconium-90 b. palladium-108 c. bromine-81 d. antimony-123
Answers: 1
Chemistry, 23.06.2019 14:00, wendyyy1214
If you fill your car tire to a pressure of 32 psi (pounds per square inch) on a hot summer day when the temperature is 35°c (95°f), what is the pressure (in psi) on a cold winter day when the temperature is -15°c (5°f)? assume no gas leaks out between measurements and the volume of the tire does not change.
Answers: 1
Chemistry, 23.06.2019 14:50, aleilyg2005
Use the bond energies provided to estimate δh°rxn for the reaction below. ch3oh(l) + 2 o2(g) → co2(g) + 2 h2o(g) δh°rxn = ? bond bond energy (kj/mol) c-h 414 c-o 360 c=o 799 o=o 498 o-h 464 use the bond energies provided to estimate δh°rxn for the reaction below. ch3oh(l) + 2 o2(g) → co2(g) + 2 h2o(g) δh°rxn = ? bond bond energy (kj/mol) c-h 414 c-o 360 c=o 799 o=o 498 o-h 464 +473 kj +206 kj -392 kj -91 kj -486 kj
Answers: 1
Asteel pipe carrying engine oil at 250°f (n = 3.2 btu/h-ft-of) loses heat to the outside air at 77 °...
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