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Chemical Heat Transfer

The thermal radiative flux from a surface of emissivity = 0.4 is 22.68 kW/m2. The approximate surface temperature (K) is (Stefan-Boltzmann constant = 5.67 × 10-8 W/m2.K4) ?

Chemical Heat Transfer /
The thermal radiative flux from a surface of emissivity = 0.4 is 22.68 kW/m2. The approximate surface temperature (K) is (Stefan-Boltzmann constant = 5.67 × 10-8 W/m2.K4) ?

A. 1000
B. 727
C. 800
D. 1200

The thermal radiative flux from a surface of emissivity = 0.4 is 22.68 kW/m2. The approximate surface temperature (K) is (Stefan-Boltzmann constant = 5.67 × 10-8 W/m2.K4) ? Read More »

Chemical Heat Transfer

The ratio of total radiating power to the absorptivity of the body depends upon the _____________ as per Kirchoff‟s law?

Chemical Heat Transfer /
The ratio of total radiating power to the absorptivity of the body depends upon the _____________ as per Kirchoff‟s law?

A. Wavelength of radiation
B. Nature of the body
C. Temperature of the body
D. None of these

The ratio of total radiating power to the absorptivity of the body depends upon the _____________ as per Kirchoff‟s law? Read More »

Chemical Heat Transfer

For small temperature difference, the heat transfer rate as per Newton’s law of cooling is proportional to (where, Δt = excess temperature) ?

Chemical Heat Transfer /
For small temperature difference, the heat transfer rate as per Newton’s law of cooling is proportional to (where, Δt = excess temperature) ?

A. Δt
B. Δt2
C. Δt3
D. √(Δt)

For small temperature difference, the heat transfer rate as per Newton’s law of cooling is proportional to (where, Δt = excess temperature) ? Read More »

Chemical Heat Transfer