Explanation
a) Specific latent heat of vaporization in the quantity of heat required to change a unit mass of a liquid at its boiling point to gas.

(b)(i) Renewable energy sources are sources of energy that cannot be exhausted.
(ii) Renewable energy sources are sun or solar, wave, wind, hydroelectric, tidal, biomass or vegetable oils, geothermal, etc.

(c) Clay pot is porous, therefore molecules of water in the moist jute bag will extract latent heat of vaporization from the tomatoes which will escape through the pores of the pot, thereby causing cooling of the tomatoes.
(i) Mass = density x volume = 8.00 x 10\(^3\) x \(\frac{70}{80}\) x 0.28 = 1568 kg.
(ii) Energy required Q = MC (\(\theta_2 - \theta_1\)) + mL
= \(\frac{10}{100}\) x 1568 x 460(1500 - 25) + \(\frac{10}{100}\) x 1568 x 1.38 x 10\(^5\)
= 106, 388, 800 + 21,638, 400
= 128,027,200J or 1.28 x 10\(^8\)J


