Question

HELP PLEASE!!!???

Answer 1

4. A typical car engine produces 44,000 kJ of heat in an hour. The cooling system has a capacity of 8.40 L and is filled with a 50:50 mixture of anti-freeze (specific heat capacity of 8.37 J/g-oC, density of 1.038 g/mL). In maintaining a constant engine temperature, the cooling system temperature increased from 95oC to 110oC. (Assume this is within allowable limits.) How many times did the cooling system turn over its volume of anti-freeze to maintain the engine temperature during its hour of operation? Show your work. (Assume that only the cooling system removes heat from the engine and no other mechanism of heat removal is involved.)

Answer 2

First calculate mass of the coolant
Mass = Volume * density.
You can convert volume as 1.038 kg/liter

Then heat capacity is 8.37 kJ / kg oC

Energy absorbed by coolant is
E = mass * heat capacity* change of temperature

Then you have to calculate, how many times cool and is circulated
In engine for removing 44 000 kJ heat.

Answer 3

@Gebooors
for the mass coolant is it 8.7192 kg/liter?? thats what i got

Answer 4

for the energy i got 1094.69556 ????

Answer 5

after this i dont know what to do and im not sure if i calculated it right