calorimetry and rate calculations

Question 1

what is calorimetry

Answer 1

when food is burnted to see how much energy it contains

Question 2

what is the equation for the engery in food

Answer 2

mass of water x temperatureture change x 4.2

Question 3

how do you calcylate how much enegy a piece of food contains

Answer 3

1. you need a food that will burn easily, ideally something dry
2. weigh a small amount of food and then skewer it on a mounted needle
3. add a set volume of water to a boiling tube, make sure it is held with a clamp. Tjod will be used to measure theamount of energy that is transferred when good is burnt
4. measure the temperature of the water, then set fore tp the food using a bisnen burner flame.Make sure the bunsen isn’t near water or your test results may look incorrect
5. hold the burning food under the boiling tube until it goes out. relight the good and hold it under the tube. keep doing this until the food won’t catch fire
6. measure the temperature of the water

Question 4

what is rate

Answer 4

a measurement of how much something changes overtime

Question 5

what does change refer to

Answer 5

the change in the substance being measured

Question 6

what does time refer to

Answer 6

the time taken for the change to occur

Question 7

what is the calculatation for rate

Answer 7

rate = change/time or 1000/time