), 35*c, 45*c, 55*c, & 60*c. Figure 1: Effect of temperature on catalase activity. From 4*c to 52*c there was a -44.1% decrease in catalase activity but had a 1.6% increase from 52*c to 60*c. (N=3 treatment) Figure 2: Effect of temperature on catalase activity from 21*c to 35*c there was a -151.4% decrease in catalase activity and rom 45*c to 55*c there was a -55.9% decrease. (N=temperature) Experiment 1 investigated the effects on cold and hot temperatures on catalase activity. Between 4*c to 52*c there was a decrease of -44.1% in the catalase activity. The
From hot to cold or cold to hot? -Technically, if it were to be mixed like the example shown in class, there would be at equilibrium. But since the heat from one is 20℃ and the other is 80℃, we ended up with 60℃ as the final temperature. The heat would transfer from cold to hot because if we mixed 50g of the 20℃ and 30g of the 80℃, we would end up having more of the 100g of water at 20℃ and less of the 200g of water at 80℃. (c) If a sample of hot water is mixed with a sample of cold water that has twice its mass, predict the temperature change of each sample?
Now to find this we would also have to look at the heating curve of the experiment. Also we have to look for when and how the physical change from a solid to a liquid (melting) happens to the Lauric Acid. * A heating curve is when you supply heat to an isolated material over a certain amount of time. To see the heating curve you must graph to noticeable see the rise and stabilization of the heat within the material. Also to further example this lab, Phase Change is when one state of matter changes to another state of matter through either endothermic or exothermic change.
Part II: Charles’s Law Data and Observations: Present all relevant data in a data table below. Include an observations section for any observations you made during the lab. Make sure you note the data needs to be converted before graphing. Data Table | Temperature (°C) | Volume (mL) | 5 | 46 | 10 | 47 | 15 | 48 | 20 | 49 | 30 | 51 | 40 | 52 | Graph: Conclusion: Answer the following question regarding this part of the lab. Describe the relationship between volume and temperature, referring to your data and/or graph to support your answer.
Important thermodynamic information, such as the enthalpy of combustion, could be obtained by measuring the temperature change. The bomb is immersed in a quantity of water and surrounded by an adiabatic shield that serves as the heat insulator. In this experiment, a commercial bomb calorimeter (Parr) is used to determine the heat of combustion of an organic compound. The sample is held in a cup that is placed near the ignition wire that is used to start the combustion reaction as shown in Figure 1. Figure 1: Schematic of a constant volume bomb calorimeter.
Experimental: The experiment started with measuring the melting point range of impure benzoic acid. The open end of a capillary tube was then tapped into the sample to be tested until 2-3 mm of the sample was in the capillary tube. The tube was
I. Introduction Calorimetry is a used to determine the amount of heat transfer in a chemical reaction. It can measure one of two things: the amount of heat that is absorbed (in an endothermic process) or the amount that is gained (in an exothermic process). To conclude the calorimetry of a substance, the equation below is used: Eq. 1 q= Cs x g x T Q represents heat.
Controlled The controlled variables of the experiment were: A. The volume and concentration of the Hydrochloric acid. B. The concentration of the Sodium Hydroxide. Equipment List * Boiling Tube * 10 cm3 1mol dm-3 Hydrochloric Acid (HCL) * 15 cm3 1mol dm-3 Sodium Hydroxide (NaOH) * pH and Temperature Probes * Data Logger * Measuring Cylinder ‘ * Boiling Tube * Teat Pipette Method * Add 10ml of Hydrochloric acid, measured in a measuring cylinder, into a boiling tube.
Energetics Aim: To measure the energy released from the complete combustion of a known mass of alcohol or paraffin wax, to heat water. Hypothesis: The combustion of alcohols is exothermic. In this experiment the energy is released from burning a known mass of alcohol in order to heat a known amount of water. A comparison of various alcohols and paraffin wax (methanol, ethanol, propanol, butanol, octanol and candle) as fuels can be made by calculating the quantity of energy transferred to the water. In this experiment, the amount of energy (heat) involved in a chemical change will be determined.