The cooling system in an automobile holds 10.0 L of ethylene glycol antifreeze. How much energy is absorbed when the temperature of the ethylene glycol goes from 20°C to 100°C? The density and specific heat capacity of ethylene glycol are 1.11 g/mL and 2.42 J/(g · °C), respectively.

Question

Quizplus · Accepted Answer

The energy absorbed can be calculated using the formula q = mcΔT. First, convert the volume to mass using the density (10.0 L = 10,000 mL, mass = 10,000 mL * 1.11 g/mL = 11,100 g). Then, use the specific heat capacity (2.42 J/(g·°C)) and the temperature change (ΔT = 100°C - 20°C = 80°C) to find q = 11,100 g * 2.42 J/(g·°C) * 80°C = 2,150,160 J, which is approximately 2150 kJ.

The Cooling System in an Automobile Holds 10