Cuiutu ridule After reviewing the above information and the videos and readings in the Instructional Resources page, give
these practice problems a try! A helpful tip for completion is to label everything first (find the Q, the m, the c,
and the AT. THEN, once you have the variables and one unknown determined, use algebra to solve.
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Question 1: Let's start simple by solving for Q. The problem will then give you the rest of the information you
need: the m, c, and the AT (you may need to calculate this by taking the T, -T.). In this case, the final temp is
the overheating temp and the initial temp is the working temp of the car.
If the temperature a car will overheat at is 121°C and the average working temperature of the car is 91°C, how
many joules of energy are required to overheat a car with 10,000g of coolant? The specific heat of the coolant
is 2.01 J/g °C.
Fill in the additional variables:
Q = ?
121
m =
10,000 g
C=
2.01 J/g
I
AT= 91
<
Now let's substitute and solve Q = m CAT. Put your answer in the box.