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Stoichiometry - Engineering

Q1:

Pick out the wrong unit conversion of heat transfer co-efficient.

A 1 kcal/m2.hr.°C = 0.2048 BTU/ft2.hr. °F. = 1.163 W/m2.°K

B 1 kcal/m2.hr.°K = 1.163 W/m2.°C

C 1 W/m2 . °C = 0.1761 BTU/ft2.hr.°F.

D 1 BTU/ft2.hr.°F = 4.88 kcal/m2.hr.°C = 20.44 kJ/m2.hr°C = 5.678 W/m2.°C.

ANS:B - 1 kcal/m2.hr.°K = 1.163 W/m2.°C

The wrong unit conversion of heat transfer coefficient is: 1 kcal/m2.hr.°K = 1.163 W/m2.°C The correct conversion should be: 1 kcal/m2.hr.°K = 1.163 W/m2.°K The unit "°K" should not be converted to "°C" because both represent the same temperature scale, just with a different zero point (absolute zero). Therefore, the conversion should maintain the temperature scale as Kelvin.