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?
), 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
The term Cp is the specific heat of the material (at constant atmospheric pressure). Different materials have different specific heat values. The units of specific heat are : Joules/gram deg – C. In this lab we will find the specific heat value of Zinc and compare it to accepted values.This will do by heating a mass of Zinc up to the temperature of boiling water and placing the hot metal into a cup of cold water. The thermal energy that the zinc loses goes into heating up the water in the cup. By knowing the starting temperatures and the final temperature of the water and the zinc, the specific heat of Zinc may be easily obtained.
AIM/ OBJECTIVE In this experiment, bomb calorimetry will be used to determine the heat of combustion (heat that the fuel gives off over a certain amount of time when it’s ignited). Determine the Calorific Value of the fuel used and show how the practically determined value compares to the theoretical calculations and industry standards 2. THEORY A bomb calorimeter is a sealed container capable of holding several atmospheres of gas pressure. It measures the enthalpy of reaction by carrying out the combustion reaction under constant volume conditions. This exothermic reaction increases the temperature inside the bomb, which then transfers the energy to the external water jacket raising the external temperature.
Chemical Kinetics: Iodine Clock Experiment Bautista, Lance Ruther E., Tornalejo, Norielle Marie B. Abstract: Is Iodine clock really a clock? In what way do we relate temperature with the rate of the reaction? How about the relationship between the concentration and rate of reaction? In this experiment, the effect of concentration and temperature on the rate of a chemical reaction will be studied. For this experiment, when the temperature increases, collision between the particles also increases.
4) Press the piston down to increase pressure. 5) Create two graphs- one with data and the second with inverse proportionality. OBSERVATION AND RESULTS: Equipment: Volume (ml)1ml error | Pressure (kPa)0.1 kPA error | 20,00 | 97,1 | 19,00 | 102,2 | 18,00 | 107,4 | 17,00 | 113,7 | 16,00 | 119,8 | 15,00 | 128,0 | 14,00 | 134,8 | 13,00 | 143,6 | 12,00 | 153,2 | 11,00 | 162,7 | 10,00 | 175,3 | 9,00 | 177.3 | 8,00 | 200,9 | 7,00 |
Catalysts operate by decreasing the value of the activation energy for the reaction. [1] The iodide ions lower the activation energy, making it easier for the reactants to convert to the products and vice versa, hence speeding up the reaction. We use an adaptation of the Arrhenius equation ln k’ = -Ea/RT + ln A . where k’ is the rate constant, Ea is the activation energy, R is the universal gas constant and T is temperature. [2] to determine the Activation Energy.
Chemical equations are written with the symbols of materials to include elements, ionic or covalent compounds, aqueous solutions, ions, or particles. There is an arrow pointing to the right that indicates the action of the reaction. The materials to the left of the arrow are the reactants, or materials that are going to react. The materials to the right of the arrow are the products, or materials that have been produced by the reaction. There are five main types of chemical reactions: synthesis, decomposition, combustion, single displacement, and double displacement.
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.
(Ron 2011) The temperature of an object or collection of matter is the average kinetic energy of the particles. Faster particles mean a higher temperature. A thermometer is used to measure the temperature and put it into temperature degrees instead of kinetic energy units. The heat is the transfer of thermal energy from an object of higher temperature to one of lower temperature. For example, an object feels warm or hot if its temperature is higher than your skin temperature.