Purpose: This laboratory was performed to find the temperature change‚ heat of reaction‚ and enthalpy change for neutralization reactions. The temperature change was found by subtracting the initial temperature from the final temperature obtained. Heat of reaction is negative heat of solution. Heat of solution was found by using the formula qsolution = mCsΔT (m= mass; Cs= 4.184 J/g°C; and ΔT = change in temperature). The enthalpy change was found by dividing the heat of reaction by the number of
Premium Thermodynamics Chemistry Chemical reaction
A critical point happens when a substance has a high enough temperature and pressure that both liquid and gas can exist at the same time. This state is called a critical point. Now‚ when a state of matter changes from one state to another is called a phase shift. Phase shifts are extremely important and most commonly observe phase shifts daily. For an example‚ when water freezes into ice‚ or the water in the shower turns to steam. To begin to start describing how a phase shift works we must understand
Premium Fundamental physics concepts Thermodynamics Temperature
CP2085 Effect of Temperature‚ Study and Measure of Enzymes Activity Abstract This experiment investigates the effect that temperature has on the rate of activity of enzyme β-galactosidase and also the rate of β-galactosidase activity in different concentration of substrate over time. Ο-nitrophenylgalactoside (ONPG) is used as a substrate for β-galactosidase. A spectrophotometer is used to detect the change in colour of the substrate. Results show that increase in temperature up to 50oC speeds
Premium Enzyme Energy Kinetic energy
Mikhail Kashtelyan The Consequences of a global temperature rise on arctic ecosystems Nowadays the climate is changing‚ in more exact words the global temperature is raising every year. Those climate changes may cause a lot of different disasters and brake of ecosystems. A place that is really endangered of global temperature rise is arctic. Arctic is a very big icy landmass that is located north of the Arctic Circle. Arctic contains a lot of different kind of species. If the icy landmass
Premium Global warming Arctic Ocean Arctic
‘Kinetics’ is the study of chemical reactions. The speed of a reaction can vary depending on many variables such as the nature of the reactants‚ particle size‚ concentration and temperature. For a chemical reaction to occur‚ there must be a collision between reactants. The reaction rate is slower when the reactants are large and complex molecules because it takes longer for the molecules to combine together creating a chemical reaction. More than 2000 years ago‚ Democritus‚ who was a philosopher
Premium Chemical reaction Chemistry Reaction rate
Investigation into the photosynthetic activity of isolated chloroplasts from spinach beet to various light conditions. Introduction Chlorophyll‚ an important pigment in chloroplasts‚ is an essential component in photosynthesis; converting electromagnetic radiation from the sun into potential chemical energy. Photons excite electrons in chlorophyll which move through the electron transport chain‚ resulting in energy being stored in the bonds of ATP and NADPH. The flow of electron through the electron
Premium Photosynthesis Light Chlorophyll
manual. The independent variable in this experiment was temperature as it was the effects of temperature that was being measured. The dependent variable were ventilation rates and oxygen consumption as they were being measured. There were 10 fish per treatment level. There were two treatment levels‚ 25 C and 15 C. Ten fish tanks per treatment level were set up‚ the first group of fish tank were filled with spring water and kept at room temperature of 25 C‚ whereas‚ the second group of fish tank were
Premium Water Liquid Chemistry
CALIBRATION USING CONTROLLED TEMPERATURE BATHS TXDOT DESIGNATION: TEX-926-K Test Procedure for THERMOMETER CALIBRATION USING CONTROLLED TEMPERATURE BATHS Texas Department of Transportation TxDOT Designation: Tex-926-K Effective Date: August 1999 1. SCOPE 1.1 Calibrate thermometers by comparison with standard thermometers while immersed in stirred water or oil baths. Alternately‚ calibrate specific points by placing in a reference temperature bath such as a mixture of
Premium Temperature Thermodynamics
LAB ACTIVITY: Coastal and Continental Temperature Ranges ANALYSIS: 1) I can tell from the temperature curves that the cities are all in the Northern Hemisphere because it ranges from low to high then back to low again starting in January. 2) The city that has the greatest yearly temperature range is Bismarck‚ N.D. 3) The cause of the greatest range is because the location is located most near the pole. 4) The rates of heating and cooling do not differ much for New York
Premium Climate Temperature Equator
speed up the activation rates that occur in living organisms. Without enzymes‚ it would be difficult to break down particles like food in the digestion system. Enzymes are all very specific to what chemical reactions they will work with‚ and the temperature‚ pH‚ and salt concentration have to be a specific levels in order for the enzyme to function. The structure of each enzyme has a fixed shape in which a certain the substrate will fit into. The sequence of the amino acids in the enzyme determines
Premium Enzyme Chemical reaction Metabolism