Question

Which of the following is not a thermal property in foods?

(a) Surface heat transfer coefficient

(b) Thermal diffusivity

(c) Specific volume

(d) Entropy

The question was asked during an online exam.

My doubt is from Heat Transfer Applications topic in chapter Heat Transfer Applications of Food Processing Unit Operations

Answer 1

Right answer is (a) Surface heat transfer coefficient

The explanation: The surface heat transfer coefficient is not a thermal property. It is required to design heat transfer equipment for processing foods where convection is involved. It depends on the fluid velocity, product size and shape, surface roughness, arrangement and packaging.