Popcorn lab chemistry answers

CaloriesSpecific heat 1cal g water. What are 3 random error examples and 3 systematic error examples that could occur from a popcorn lab in chemistry.

Record the mass of the beaker with oil and popcorn.

Popcorn lab chemistry answers. Answer the following in your lab notebook. REWRITE THE QUESTIONS AND SHOW ALL WORK AND UNITS 1. What is the percent of water in the popcorn.

How many moles of water were in the popcorn. Using the ideal gas law determine the pressure of steam water vapor inside the kernel at the time of pop. Come to the front and fill up a small container with popcorn kernels.

All groups will weigh out 10 g of popcorn at their lab station. Fill in all the blanks on the handout and show work on the questions that require calculations or conversions. Answer to question 8 needs to be put in the class data table on the board.

Calculate the volume of the popcorn kernels. Add just enough oil to cover the bottom of the beaker. Pour the water and kernels from the graduated cylinder onto paper towels and dry the kernels.

Add the dry kernels to the beaker with oil. Record the mass of the beaker with oil and popcorn. 1 They dont have enough water in them to generate enough pressure.

2 Theres a crack in the kernel which lets out heat during process so no pressureno explosion. 3 Theres not enough heat to. What does popping popcorn involve.

Determine the percent water in popcorn and use ideal gas law to determine pressure inside the kernel when it pops. What is the purpose of this lab. Wear goggles inspect glass for cracks hear flask evenly so oil doesnt spatter.

Using the mass percent formula mass percent of water in kernels mass of water in kernelstotal mass of kernels x 100 we determined that there was 13 water in the white kernels and 13 water in the yellow kernels. So in short words the popcorn has 13 of water. The popcorn needs water in it for it to pop.

Adham Chemistry Lab 2 November 8 2015 Percentage of Water in Popcorn Introduction. Popcorn pops because of the natural moisture inside each kernel. When the internal water is heated above 100C the kernel expands rapidly and the liquid water changes to a gas which takes up much more space than the liquid so it pops.

If the kernel expands then the mass will stay the same because the law of conservation of mass states that during a chemical change the total mass of the material is the same as the original. We are going to need a popcorn machine. We are going to need kernels.

First we have to count the kernels. The popcorn pops more efficiently if the beaker is held firmly with tongs and gently shaken side to side on the wire gauze. -Mass of 250 mL Beaker g12336 g.

-Mass of beaker oil g12413 g. -Mass of beaker oil 20 kernels before popping g12705 g. Notice that the food is burned directly below a container of water.

The change in the temperature of the water can be easily measured with a thermometer. This change in temperatureis directly related to the number of calories released as shown. CaloriesSpecific heat 1cal g water.

Answer the rest of the questions of the lab and finish the scientific method. Do NOT eat the popcorn. It has been in glassware that at one point probably contained harmful chemicals.

No matter how clean you think your glassware isthere is still some hazardous residue remaining behind. Mass of the Popcorn. 6 Determine the rate at which the popcorn popped by dividing the number of kernels popped by the time it took them to cook.

Make sure to include units in this answer. _____ 7 Clean up. Clean up your lab station and have Mr.

Guch initial that your lab station is clean. _____ Popcorn Kinetics Lab Group 3. The pressure inside the popcorn will vary greatly.

Answers should however range from 100 to 350 atm. Read barometer and convert to atmospheres. It is much larger.

Throughout the laboratory activity the volume of popcorn kernels was assumed equal to the volume of displaced water. 5Mass 2 drops of oil 17 kernels of popcorn 250 mL flask 12813 g 6Cool the flask and mass its content after popping the kernels 12778 g remove wire lid and the water vapour at the top 7Number of unpopped kernels 2 8Mass difference after the kernels pop 035 g 9Atmospheric pressure. Half Life Popcorn Lab Purpose.

To simulate radioactive decay and determine the half-life of a radioactive substance. Count out 100 kernels of popcorn 2. Put the kernels into the petri dish with a 5cm or 10cm piece of masking tape attached 3.

Copy a table like the one below into your notebook. Shake the petri dish and observe the kernels. Formal Lab Report Support Sheet WARNING.

This sheet is designed to help students avoid common mistakes and errors when writing the formal lab report for the Popcorn Chemistry Lab. You should use this in conjunction with the formal lab report packet because this does not include all parts that should be in each section. Chemistry questions and answers.

CHE 11 Popcorn Lab Pre Lab Questions 1 A student performed the popcorn lab and got the following data. 200 g Mass of unpopped kernels. 7489 Determine the percent-by-mass of water in popcorn 2 Is it possible to have a percent-by-mass of 110 explain your answer.

We did a popcorn popping lab for chemistry and I was wondering if someone could help me with these few questions here. 1 Why is popcorn better stored in the freezer or refrigerator rather than on the shelf at room temperature. I think it has something to do with the water content.

To determine the percent composition of water in microwave popcorn. Balance microwave popcorn calculator PROCEDURE. Take the popcorn out of the plastic wrapper and place on the scale.

Record the mass in the table below to the hundredth place. The purpose of this lab is to determine the percent water in popcorn and the pressure inside the kernel when it pops. Wear protective goggles throughout the laboratory activity.

Heat the flask evenly to prevent spattering the oil. The purpose of this science lab is to teach the three types of heat transfer conduction radiation and convection. In this lab we make popcorn to demonstrate these different types of heat transfer.

For conduction we use a pan. For radiation we use a microwave. For convection we use an air pop.

Chemistry questions and answers. What are 3 random error examples and 3 systematic error examples that could occur from a popcorn lab in chemistry. What are 3 random error examples and 3 systematic error examples that could occur from a popcorn lab in chemistry.