Fire Snake Experiment Lab Report

he experimental variable in this experiment was the changing number of Alka Seltzer tablets that were put into the 250mL beaker of vinegar. Some of the control variables in this experiment were that the same beaker and thermometer were used for each trial, the same type of vinegar and Alka Seltzer were used for each trial, and the same amount of vinegar. The original Hypothesis was that more Alka Seltzer would increase the temperature of the vinegar was not correct. After analyzing the data it can be seen that for the first trial the temperature did not change as it stayed at 24 degrees Celsius before and during the reaction with 1 tablet, also for trial two with two tablets the temperature stayed the same at 23 degrees Celsius and did

Experiment 2 focused on finding the enthalpy of solution of magnesium chloride. Testing the enthalpy of solution started with measuring out 10 mL of deionized water in a graduated cylinder for three separate trials, each trial having a different mass of magnesium chloride. The water was then poured into a well of a Styrofoam calorimeter then the initial temperature of water was taken using a temperature probe and the LoggerPro programming. A measured amount of magnesium chloride was placed in the same well as the water in the calorimeter,

The Frog Fire is one of more than a dozen wildfires burning across California. The Frog Fire has consumed 800 acres of land since Thursday (date). Around 8,000 firefighters are working to contain these California wildfires. The California National Guard even sent nine planes in an attempt to get rid of the flames.

Aim: To plan, conduct, evaluate and report on an investigation of chemical changes, and make recommendations for their use as an energy source in Heat-and-Eat meal packs.

The amount of tablets did effect the temperature of the water. Our findings made our hypothesis incorrect. The temperature of the water did increase as the number of the tablets increased also. In this experiment, the finding were quite surprising, simply because I thought that the temperature of the water will decrease as the amount of the number of tablets increased. In the real world I feel like this information would be beneficial, because it shows the reaction of an acid plus a base mixed with water.

This hypothesis relates to the experiment by saying how when different liquids were used, there were many different reactions. Proving the hypothesis is supported. The experiment could be done differently by using other powders, liquids, etc. This could cause many changes. One thing is the expansion of options. It would have many substances to compare to the unknown. Thus creating a lot more options for the unknown powder to be. It could also increase the probability of error, from having so many different resources. Sources of error could include adding too much powder and not enough liquid. Doing this could cause the balance to be off. For example, not adding enough liquid could cause the powder to not react. When in reality, the substance usually fizzes or changed color. Doing this experiment made learning about different reactions to different substances

A Cheeto Puff was used as the food sample in the second experiment. The heat capacity of the sinker was determined by dividing the heat absorbed by the water by the sinker’s temperature change and the two values for each trial were determined to be 7.82 J/०C and 9.88 J/०C, with an average actual specific heat capacity of 0.136 J/g०C, a 16.9% difference from the theoretical heat capacity of lead of 0.159 J/g०C. The percent difference was too vast to support the hypothesis, which required that heat capacity be calculated accurately with little error. For this first experiment, performance errors that contributed to the inconsistent results were the touching of the the thermometer to the calorimeter and continuous, unnecessary movement of the thermometer, producing inaccurate measurements of the water temperature. Likewise, the lead sinker was left out in the open for too long while transitioning between the hot water bath and the calorimeter, causing heat and energy loss.

The time that the food was burning could have affected the hypothesis to make it wrong because the more time the food is burning, the more grams it is losing. I think that the amount of time burning and the temperature of the water at the end has to do with empty calories. The more empty calories there where compared to actual calories, the less time it would burn, and the less heat it would

The aim of this experiment was to test the heat of combustion over a period of time, and the energy required to combust alcohols with different carbon chain levels. It was hypothesised that the higher the carbon chain of the alcohol present, the faster the heat of combustion will occur. Meaning more energy will be released for a higher carbon chain. After calculating the results from the experiment it was found that the hypothesis was partially supported. The reasoning for this is as the alcohol that posses a higher carbon chain, generally increased there reaction rates. However there were a few exceptions to this rule.

The first question was, “What type of energy was produced?” Since I used several liquids such as water, milk, and tea, it all had different outcomes. But once I constantly put the alka seltzer in each cup, the energy was released. Exothermic energy was revealed because the tablets had particles inside it that made the liquids start to have an explosion effect. “Why does different temperatures of liquid give unlike results?” is the next question on the list.

The inevitable despair love causes, reflects the constant arrival of new beginnings that can tear apart the passion that was once the fruit of an individual's inspiration. In “The Apparition” the narrator relates that once he is dead he will come back and haunt his lover for having made him feel less and lead her to a life full of anxiety. Likewise, in “ My Mistress’ Eyes” the author becomes realistic and compares his mistress with the correct associations. “Dover Beach” revolves around the love of nature and its beauty and how the human kind hasn’t valued it and turned it into sadness and war. Moreover, the tone in “ The Apparition” by John Donne, “ My Mistress’ Eyes” by William Shakespeare, and “Dover Beach” by Matthew Arnold enhances

Consequently exposing those targeted communities’ cultural practices and institutions to promote and later perpetuate several negative stereotypes.

In order to determine whether a hydrocarbon produced heat upon altering its chemical state, a bomb calorimeter was used to find the value of the heat of combustion for sucrose and an altoid mint. Using benzoic acid to calibrate the bomb calorimeter, the two samples were individually placed in a combustion cup within a stainless-steel cylinder enveloped in water, sealed shut by a shield containing a thermometer. After igniting the bomb, a change in temperature (°C) versus time (s) was recorded. Using the following equation, ∆T=T_c-T_A-r_1 (b-a)-r_2 (c-b), the ∆T of benzoic acid was 3.71°K. Which lead to the determination of the effective heat capacity, using C_(v,cal)=((∆cH_b-∆nRT/m_b ) m_b+C_Fe+C_N)/∆T, to be -9,666.27J/g

The lab used methods of calorimetry in order to measure the temperature change of reactions and calculate the changes in

One of the biggest problems facing mankind is global warming. More than 97 perecent of the world scientists believed that human activities mainly the burning of fossil fuel caused global warming. Exacerbated by global warming, the occurrence of extreme weather events such as hurricanes, droughts, rising sea level, floods,and heatwaves are becoming more frequent and sever. In the past two decades global warming induced extreme weather affected almost half of the world population. The scientific evidence is now clear that global warming is a growing threat to society. Hoping to reach a significant agreement to reduce greenhouse gas emissions and contained the average rise in global temperature under 2C, leaders around the world have