Essays Tagged: "Heat capacity"

Evaluating an enthalpy change that can not be measured directly

at CannotBe Measured Directly.Introduction.We were told that sodium hydrogencarbonate decomposes on heating to give sodiumcarbonate, water and carbon dioxide as shown in the equation below:-2NaHCO3(s) ... two reactions can be worked out using the formulashown below :-Energy Exchanged between = Specific Heat Capacity x Mass of the x TemperatureReactants and Surroundings of the Solution Solution Change. ...

(2 pages) 49 0 3.9 Jan/1996

Subjects: Science Essays > Chemistry

The heat of combustion for one mole of alcohol.

Chemistry courseworkMy aim is to find the molar heat of combustion of ethanol, propanol and butanol .I will also be comparing the experimental molar ... ratus: butanol burner, copper calorimeter, thermometer, clamp stand, measuring cylinder, stopwatch, heatproof mat, and goggles, then set them up·I measured out 25ml of water·I took the i ... :Energy supplied to water=mass of water x s.h.c of water x temp changes.h.c stands for the specific heat capacity of water(J/GºC).s.h.c equals 4.2 because it takes 4.2 joules of energy to heat to ...

(7 pages) 35 0 0.0 Nov/2003

Subjects: Science Essays > Chemistry

IB Physics Thermodynamics Lab- "The purpose of this lab is to determine the identity of an unknown metal, and to prove whether the laws of thermodynamics hold when determining this identity."

whether the laws of thermodynamics hold when determining this identity. Using the accepted specific heat of water (4186 J/kg · oC), heat flow between two different sets of water though the cond ... though the conduction of an unknown metal can provide useful data in determining the identity. The heat transfers can be calculated to approximate the specific heat of the unknown metal.When heat is ...

(4 pages) 66 1 5.0 Jan/2004

Subjects: Science Essays > Physics

Describe The Roles of Water in Living Organisms

moregulation is very important and water plays a part in this. One method of reducing internal body heat is sweating; sweat is mostly made up of water. The structure of the water molecule means that i ... ore the molecules begin to move about and therefore change state. It is because of this high latent heat of vaporisation that water is an effective coolant; energy from the body is used to evaporate s ...

(4 pages) 33 0 3.0 Mar/2004

Subjects: Science Essays > Biology

Investigating the factors which effect the heating up of a liquid

Investigating the factors which effect the heating up of a liquidIntroductionIn this experiment I am going to see the difference in the tempera ... uctionIn this experiment I am going to see the difference in the temperature of water that is being heated as time increases.Circuit DiagramFactorsThere are several different variables that I could ha ... there was more particles that need to gain kinetic energy therefore the liquid would take longer to heat up. Different liquids have different specific heat capacities and so if we varied the liquid th ...

(4 pages) 19 0 0.0 Mar/2004

Subjects: Science Essays > Physics

The Physics Behind Range-Top Cooking

the use of range-top cooking devices there are many concepts that physics can explain. For example, heat is a major concept in this type of cooking. Heat is the amount of energy that is transferred fr ... of energy that is transferred from one body to another because of a difference in temperature. When heating an object, there is a raise in the internal energy, or thermal energy, of that object. This ...

(3 pages) 23 0 3.7 Apr/2004

Subjects: Science Essays > Physics

The combustion of Alcohols investgation: Investigate the heat energy in a range of alcohol's used as fuels.

Combustion of AlcoholsTHE COMBUSTION OF ALCOHOLSPROBLEMInvestigate the heat energy in a range of alcohol's used as fuels.HYPOTHESISI predict that octanol will release the ... H20OCTANOL2C8H15OH + 24O2(r) 16C02 + 18H20We can see from the table above Octanol releases the most heat energy. This clearly shows that there is a correlation between the number of bonds in the molec ... of bonds in the molecules and how much total energy was released.I also predict that the amount of heat energy released will increase with the number of carbon atoms in the alcohol. I can show this o ...

(5 pages) 36 0 3.0 May/2004

Subjects: Science Essays > Chemistry

Heat of Formation

Purpose to verify that heat is released when a new bond is formed to calculate the amount of heat (cal/g) released w ... to calculate the amount of heat (cal/g) released when CuSO4 is hydrated by applying the specific heat formula (mass (g) x Δt°C x Cp)CuSO4(s) + 5H2O(l) CuSO4*5¬¬H2O(s)Materials ... temperature 1.8°CCp of H2O 1 cal/g°CCp of test tube .161 cal/g°Cheat gained by test tube .43 calheat gained by added H20 7.2 calheat gained by H2O i ...

(2 pages) 31 0 3.0 Jul/2004

Subjects: Science Essays > Chemistry

Combustion Of Alcohols

is:H H | | H - C - C - O- H + 3[O=O] ? 1/2[O=C=O] + 3[H-O-H] | | H HThis reaction is exothermic, as heat is given out. This is because the amount reactant energy is more than the product energy the di ... t energy the difference between this is ?H, therefore some energy has been given out in the form of heat.The energy is given out when forming the bonds between the new water and carbon dioxide molecul ...

(9 pages) 36 0 3.3 Jan/2005

Subjects: Science Essays > Chemistry

Fire.

ustion." In most cases oxygen from the air combines with some material that can burn. This produces heat. If the process takes place rapidly, we may see flames or an intense glow which is called fire. ... is essential if a fire is to be extinguished. The three (3) major elements of fire are: a) air; b) heat; and, c) fuel. All three of these elements inter-react to create a fire. If the reaction linkin ...

(1 pages) 20 0 5.0 Oct/2005

Subjects: Science Essays > Chemistry

Water.

edge, elevation, rate of evaporation, and surface tension.Due to hydrogen bonding, water has a high heat capacity, which makes it different from many substances. This means you need more energy in ord ...

(1 pages) 503 1 1.7 Nov/2005

Subjects: Science Essays > Biology

Special attributes of Water: adhesive, cohesive, surface tension, heat capacity.

izard is able to escape predation by other animals, and to quickly search for food.Water has a high heat capacity. Specific heat is the measure of heat capacity. Basically it is the heat required to r ... lly it is the heat required to raise the temperature of 1 gram of water 1ºC. Water, has a high heat capacity which means that changes in temperature more slowly occur than in other compounds that ...

(2 pages) 22 0 3.4 Apr/2006

Subjects: Science Essays > Chemistry

The Importance of Water in Living Organisms

ad out, reducing the risk of competition; temperature remains constant (due it to its high specific heat capacity) so few temperature control mechanisms are needed; finally water filters out harmful u ...

(3 pages) 13 0 2.3 Jun/2006

Subjects: Science Essays > Biology

The Importance of Water in Living Organisms

ad out, reducing the risk of competition; temperature remains constant (due it to its high specific heat capacity) so few temperature control mechanisms are needed; finally water filters out harmful u ...

(3 pages) 18 0 4.6 Jul/2006

Subjects: Science Essays > Biology

Formal Report on Heat Capacity Ratios of Gases

Formal Report on Heat Capacity Ratios of GasesAbstractThis report discusses an investigation of the heat capacities o ... cities of Helium, Nitrogen, and Carbon Dioxide. To accurately determine experimental values for the heat capacity of each gas, the heat capacity ratio was calculated from measurements of the speed of ... , an osilliscope, a ruler, an audio oscillator, and a frequency counter. The experimental values of heat capacity were found to agree with the theoretical values within the range of uncertainty. This ...

(16 pages) 76 0 3.4 Jul/2007

Subjects: Science Essays > Chemistry

The aim of our lab was to determine the specific heat of copper and to compare with the actual result and then find the experimental error.

Specific Heat Labhttp://honolulu.hawaii.edu/distance/sci122/Programs/p21/image.gifAim:Specific heat is the am ... per mass required to raise the temperature of 1ºC. Different materials have different specific heats. The aim of our lab was to determine the specific heat of copper and to compare with the actua ... p to 28/27. After collecting all the needed information we plugged in our results into the specific heat formula:Then we made the specific heat of copper – X and solved the equation.Calculations: ...

(3 pages) 14 0 2.3 Sep/2007

Subjects: Science Essays > Chemistry

Biotechnology

t is due to its properties like: transparency, cohesion, solvent properties and thermal properties: heat capacity, boiling and freezing points and the cooling effect of evaporation.Transparency means ... carried in blood and cell sap in plants.Water has its thermal properties as well. Water has a large heat capacity – to raise its temperature, we need large amounts of energy because the role of h ...

(3 pages) 2203 0 0.0 Jan/2008

Subjects: Science Essays > Biology

Bio 207 notes "animal physiology"

Compare to air, water has higher density, Water has higher heat capacity, lower oxygen content, higher electrical conductivity, higher viscosityFish is osmocon ...

(4 pages) 16 0 3.0 Nov/2008

Subjects: Science Essays > Biology > Human Biology

Enthalpy Of Solution Lab Report Assessed on: * Data Collection and Processing (DCP) * Conclusion and Evaluation (CE)

d the solid salt and stir the mixture thoroughly and continuously.Calculate ΔHsol. Ignore the heat capacity of the caleriometer.ResultsRaw DataTab.1. The different data required for the calculat ... ydroxide (NaOH) in had holes. And this increases the energy lost to the surroundings in the form of heat, which affects the temperature. �Processed DataCalculationsTheory states:ΔH= -Q/nQ ...

(8 pages) 31 1 5.0 Mar/2009

Subjects: Science Essays > Chemistry

General Chemistry

ent 9 ThermochemistryThis specific experiment was about utilizing a calorimeter to measure specific heat capacity of different solutions and elements.H+ + OH- <-> H2ONH4NO3(s) NH4+ (aq) + NO3-(a ... s and elements.H+ + OH- <-> H2ONH4NO3(s) NH4+ (aq) + NO3-(aq)The Ccal represents the specific heat of the calorimeter, it basically measures how much heat is required to raise the temperature by ...

(1 pages) 0 0 0.0 Oct/2013

Subjects: Science Essays > Chemistry