Essays Tagged: "Exothermic reaction"

Nitric Acid

ith water. Ammonia and air are passed over a heated platinum catalyst at 900 degrees centigrade. An exothermic reaction takes place producing nitrogen monoxide and steam. The mixture of gases is coole ...

(1 pages) 34 0 4.8 Apr/2003

Subjects: Science Essays > Chemistry

The enthalpy change of combustion for the alcohol homologous series.

gy level diagram. The enthalpy change is negative because the reactants loose energy, therefore all exothermic reactions will have a negative value for their enthalpy change. Energy is not actually ma ... mosphere.This can be demonstrated with an energy level diagram which shows that this reaction is an exothermic reaction because energy is lost in the surroundings from the reactants. All of the reacti ...

(19 pages) 95 1 3.5 Apr/2003

Subjects: Science Essays > Chemistry

Heat of Reaction.

0J (NaOH)= 025kg X 4200 X (38?- 31?) HCl= 735J (HCl)= 630J (NaOH) + 735J (HCl)= 1365JConclusion: An exothermic reaction takes place when NaOH is mixed with HCl. The amount of heat produced when .0025 ...

(1 pages) 39 1 4.0 May/2003

Subjects: Science Essays > Chemistry

Chemisty review on mass/matter and seperating mixtures

rdestroyed.-Reactant- left, starting-Product- right, end-Endothermic reaction- absorb heat (candle)-Exothermic reaction- releases heat (running)-III- Temperature- freezing point of water is 0 c or 32 ...

(1 pages) 30 0 4.3 Mar/2004

Subjects: History Term Papers > North American History

Investigation into temperature change during neutralisation.

Introduction.The following is an experiment into temperature change in an exothermic reaction taking place between Sodium hydroxide (NaOH) and Hydrochloric acid (HCl) and als ... reaction feature a neutralisation, an energy change (shown as a temperature change) that is usually exothermic (gives out heat).The reaction of neutralisation is exothermic because of the bonds being ...

(3 pages) 18 1 3.0 Sep/2005

Subjects: Science Essays > Chemistry

Chemical bonding

shell complete and it more stable. During this reaction light and heat are given off. This shows an exothermic reaction, which is a release of energy. The electrostatic energy between the two holds th ...

(2 pages) 8 0 0.0 Feb/2008

Subjects: Science Essays > Chemistry

Report on the Factors Affecting Rate of Reaction

to HCl, the temperature of the mixture immediately increased which led me to believe that it was an exothermic reaction. Besides this increase in temperature, I observed that in the HCl (2M) the magne ...

(2 pages) 14 0 0.0 Oct/2008

Subjects: Science Essays > Chemistry

Enthalpy and Potential Energy - Study Notes

ns of the ions changed)-any change in potential energy → called enthalpy change (in this case, exothermic – energy is released)NaOH (s) → NaOH (aq)Potential Energy change = enthalpyEnth ... ter (surroundings) increasesΔH is positive for waterΔH is negative for NaOHConclusions: exothermic reaction (negative ΔH for system → potential energy went down, released by the ...

(3 pages) 11 1 0.0 Jan/2009

Subjects: Science Essays > Chemistry

In-depth explanation of the Haber Process.

rates.Equilibrium constantEquilibriumThe ratio of product concentrations to reactant concentrations.ExothermicReactionsA reaction where reactants release energy to form new products.Le Chatelier's Pri ... in the air, iron as a catalyst and 250-400 degrees Celsius of heat for the reaction to occur. This exothermic reaction releases 45.7 KJ/mol of energy at 298K or 25°c which is considerably high [3 ...

(10 pages) 44 1 4.7 Aug/2009

Subjects: Science Essays > Chemistry

chemistry essay

) with Hydrogen Dioxide (water, H2O) which produces Calcium Hydroxide (Ca(OH)2)The formula for this exothermic reaction is:CaO + H2O > Ca(OH)2 + HeatOnce the heating reaction is complete, the Calci ... hen the button at the bottom of the can is pressed, the water mixes with the quicklime, starting an exothermic reaction that heats the contents of the outer chamber in less the 3 minutes by 50-55° ...

(3 pages) 19 0 0.0 Jun/2014

Subjects: Science Essays > Chemistry

Catalyst affect on hydrogen peroxide

r activation energy. In this case, it is Manganese Dioxide added to Hydrogen Peroxide, and it is an exothermic and an immediate reaction. When Manganese Dioxide was added to Hydrogen Peroxide, it bubb ...

(12 pages) 1 0 0.0 Nov/2014

Subjects: Science Essays > Chemistry