Ethylene glycol, used as a coolant in automotive engines, has a specific heat capacity of 2.42 J/(g·K). Calculate q when 3.65 kg of ethylene glycol is cooled from 132°C to 85°C.

Question

Quizplus · Accepted Answer

The heat energy (q) can be calculated using the formula q = mcΔT, where m is mass, c is specific heat capacity, and ΔT is the change in temperature. Converting 3.65 kg to grams gives 3650 g. ΔT = 85°C - 132°C = -47°C. Thus, q = 3650 g * 2.42 J/(g·K) * (-47 K) = -416,949 J, which is approximately -420 kJ.

Ethylene Glycol, Used as a Coolant in Automotive Engines, Has