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1- A car engine's cooling system con-
tains 20.0 L of water (1 L of water has a mass of 1 kg).
a. What is the change in the temperature of the
water if 836.0 kJ of thermal energy is added?
b. Suppose that it is winter, and the car's cooling
system is filled with methanol. The density of
methanol is 0.80 g/cm². What would be the
increase in temperature of the methanol if it
absorbed 836.0 kJ of thermal energy?
c. Which coolant, water or methanol, would better
remove thermal energy from a car's engine?
Explain.

Respuesta :

pstnonsonjoku

The temperature change in water is 9.95°. The temperature change in methanol is 20.65°. Water removes the thermal energy from the engine better.

What is a cooling system?

A cooling system is a system that is design to reduce the temperature of a car engine as the car in in operation.

For water;

H = mcθ

H = heat added

m = mass of water

c = heat capacity of water

θ = temperature rise

θ = H/mc

θ = 836.0 ×  10^3 J/20 Kg × 4200

θ =  9.95°

For methanol;

mass = density × volume = 0.80 g/cm3 × 20000cm^3 = 16Kg

Hence;

θ =  836.0 ×  10^3 J/16Kg × 2530J

θ = 20.65°

The thermal energy that is removed is higher with water.

Learn more about specific heat capacity:https://brainly.com/question/2530523

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