In an evaporator, the heat lost by heating water must be equal to the _____________
(a) sum of heat gained by the product and heat lost from the evaporator to its surroundings
(b) sum of heat lost from the evaporator to its surroundings in each step
(c) heat gained by the product
(d) overall heat lost from the evaporator
The question was posed to me during an online interview.
My doubt is from Basic Principles of Food Process Engineering topic in division Introduction & Unit Systems of Food Processing Unit Operations