After seeing this data the two most effective look chemical at resisting energy was CaCl2 and LiCl. So we looked at the price of both of this chemical CaCl2 cost 6.55$ per 500g and LiCl cost 32.75$ per 500g because CaCl2 was substantially cheaper we decide to chose it to use in own hand warmer. We calculated that it would take 22g of CaCl2 to create a 20oC increase in temperature of 100ml of water. Some sources of error in this lab, would be heat escape from not be able to replace the lid of the calorement went adding chemical into it, inaccuracies in the balance, and not waiting of the proper time to recode the
Then the scientist will observe the different rates of reaction with temperature. The Boltzmann distribution of law, indicates that high temperature makes molecules gain high energy contents (pubs.acs.org/doi/abs/10.1021/ja). In order to measure the reaction rate, the scientists must use the same volume of water at three different starting temperatures: hot tap
Modifications of this procedure include the use of hot plates instead of Bunsen burners, and heating t-butyl alcohol to 60-65 ℃ instead of 50 ℃. Other modifications include the use of weighing boats to measure an amount of unknown instead of weighing paper, and completing one run of unknown 2 instead of two runs of unknown 2. Summary of
3.06 Lab Guide Please use this as a guide in your investigation of the crime you read about for lab 3.06. Areas where you need to answer have been marked with either question/answer numbers or a table to fill out. PART I - Investigation Lab Journal: The Basics (Notes, rather than full sentences, are fine) 1. What do you see when you walk on the scene?
2) The glass beaker was placed in the freezer. 3) The temperature of the heavy whipping cream was checked with the thermometer every few minutes until its temperature reached 3˚C. 4) The heavy whipping cream, which was then at 3˚C, was transferred from the beaker to the container.
Place the plants back into their place until Day 4 of the experiment. Day 4 Put 30 mL(medium) of water to the 1-6 cups.
During the cooler seasons, Virginia gets very cold and thus, the people living in Virginia also get cold. The colder temperatures, not only in Virginia, are the reason for the existence of hand warmers. The experiment conducted was perused for the sole reason of saving money on these said hand warmers. If having more sodium acetate in the hand warmer lasts longer with the highest temperatures than having less sodium acetate, then one would simply buys the bigger hand warmer. After making sodium acetate, the liquid was placed into pouches, which would go on to be tested for their temperatures over a certain period of time.
Science fair proposal By: Gilbert Villalobos 10-19-17 Abstract My goal was to find out if temperature affects the strength of a magnet. If the strength of the magnet either has more effect either in the pot of boiling water or in the bowl of ice, which ever magnet gets the less paper clips attached to it will have the greatest effect.
Introduction The intent of this experiment is to understand how hot and cold water interact with each other by combining clear hot water and black ice cold water. I hope to learn more about how hot and cold water interact with each other. As of now, I know that cold water is denser than hot water. Knowing this I formed my hypothesis.
Place the the beaker onto a hot plate that is on a low heat setting (about setting 3). Every 5 minutes for 20 minutes, measure the circumference of the balloon and record it in Data Table A. You can measure the circumference of the balloon by looping a piece of string around it then using a ruler to measure the string’s length. Record the data in the data
Investigation of the effect of NaCl concentration on the evaporation rate of water. Chemistry HL Internal Assessment Vitaebella Tsang Ao Ling Contents page Contents page 2 Introduction 3 Design 4 Research question 4 Variables 4 Method 5 Results 6 Discussion 9 Evaluation 9 Bibliography 10 Introduction Many recipes call for salt to be added to the water when cooking pasta to add flavor, but there has been common belief or misunderstanding that adding salt will make the water boil faster. However, it is now known that that is not the fact, and that adding salt will do the opposite and make the water boil more slowly instead.
4. In a microwave oven or a saucepan, heat the butter and milk together up until the butter melts and the mixture
➢ Select the flask, and then choose 50 mL of crude oil from the Chemicals menu. Then, by selecting the flask and choose “Chemical Properties” option from dropdown. NOTE: Record the grams of gasoline, kerosene, and lubricating oils that are present in the 50 mL of crude oil. ➢ Select the flask, and choose Heating Mantel option afterward select Max Heat and make sure you record the temperature when you see crude oil begins to boil. ➢ When the crude oil begins to boil, Make sure you turn the temperature down to 60% by decreasing the heating metal two times.
For our Capstone project we served dinner at the Russell and Ann Gerdin Hope Lodge in Iowa City on Tuesday August 4, 2015. We choose the Hope Lodge after discussing previous capstone class projects and our desire, as nurses, to do a project for adults with illnesses. We focused on adults as that is the population we all work with in our day to day careers. With Matt and Heidi working in the Clinical Cancer Center infusion suite the Hope Lodge dinner seemed an appropriate choice. We all pitched in to serve the residents a home cooked meal.
Put this mixture in the microwave and cook for about 1 to 2 minutes. Take it out and stir. Then, put it back in the microwave to cook for 60 more seconds. 6. Serve warm.
