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.
14 -
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.

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.