'4 kj' presentation slideshows

Thermochemistry

Thermochemistry. The study of heat change in chemical reactions. Thermochemistry is part of a broader subject called thermodynamics , which is the scientific study of the interconversion of heat and other kinds of energy.

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Warm up

Warm up. Complete the following reactions A warm solution of ammonium chloride is combined with a warm solution of sodium carbonate Sulfur trioxide is bubbled through water Potassium carbonate is heated. Chemical Reactivity. What drives chemical reactions? How do they occur?

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MOLARITY

MOLARITY. INTENSIVE and EXTENSIVE PROPERTIES. Extensive Properties - are properties that depend on how much matter is being considered for example: volume the property of space a substance takes up is a value dependent on how much of the substance there is. Can you think of others.

549 views • 41 slides

MOLARITY

MOLARITY. INTENSIVE and EXTENSIVE PROPERTIES. Extensive Properties - are properties that depend on how much matter is being considered for example: volume the property of space a substance takes up is a value dependent on how much of the substance there is. Can you think of others.

576 views • 41 slides

Review & More Applications

Physics I. Review & More Applications. Prof. WAN, Xin xinwan@zju.edu.cn http://zimp.zju.edu.cn/~xinwan/. Moments of Joy. ??????.

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Thermodynamics

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Thermodynamics

Thermodynamics. Three laws of thermodynamics Spontaneous processes Entropy Second and third law of thermodynamics Gibbs free energy Free energy of Chemical equilibrium. I. Three laws of thermodynamics. First law: conservation of energy Energy cannot be created or destroyed

866 views • 30 slides

Thermochemistry

Thermochemistry. Sections 17.1, 17.2. Observing Heat Flow. Test the temperature difference of a rubber band (by touching to forehead) Control temp = non-stretched Test 1 = stretch and hold Test 2 = stretch and release Continue tests until certain of observations When did it feel warm?.

341 views • 24 slides

Thermodynamics

Thermodynamics. Every physical or chemical change is accompanied by energy change. Thermodynamics: branch of chemistry that studies energy changes s pecifically: changes in heat energy. Thermodynamics. Tells us if a reaction will occur 2 considerations: e nthalpy (heat energy)

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Sample Exercise 5.4 Relating ? H to Quantities of Reactants and Products

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THERMOCHEMISTRY

THERMOCHEMISTRY. CP Unit 9 Chapter 17. Thermochemistry 17.1. Thermochemistry is the study of energy changes (HEAT) that occur during chemical reactions and changes in state. ENTHALPY 17.2.

616 views • 21 slides

THERMOCHEMISTRY

THERMOCHEMISTRY. CP Unit 9 Chapter 17. Thermochemistry 17.1. Thermochemistry is the study of energy changes (HEAT) that occur during chemical reactions and changes in state. ENTHALPY 17.2.

626 views • 21 slides

Energy! Energy: the capacity to do work or supplying heat ?Energy is detected only by its effects

Energy! Energy: the capacity to do work or supplying heat ?Energy is detected only by its effects ?Energy can be stored within molecules etc as chemical potential ???energy ?We will most often deal with energy changes with heat (q)

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CHAPTER

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COMBUSTION of PROPANE

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Standard Heats of Reaction

Standard Heats of Reaction. The value of D H for a reaction depends on the temperature and pressure so scientists have agreed upon a set of reference conditions for the comparison of enthalpy data. These conditions are 25 o C and 100. kPa. (SATP).

518 views • 13 slides

1.4 Energetics

Introduction to Energetics. a. demonstrate an understanding of the term enthalpy change, ? H b. construct simple enthalpy level diagrams showing the enthalpy change

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Calculating Enthalpy Change

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Chapter 6: Thermochemistry

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Bond Enthalpy

Bond Enthalpy. Chem 12. D H 0 = 436.4 kJ. H 2 ( g ). H ( g ). +. H ( g ). D H 0 = 242.7 kJ. Cl 2 ( g ). Cl ( g ). +. Cl ( g ). D H 0 = 431.9 kJ. HCl ( g ). H ( g ). +. Cl ( g ). D H 0 = 498.7 kJ. O 2 ( g ). O ( g ). +. O ( g ). O. D H 0 = 941.4 kJ. N 2 ( g ).

157 views • 6 slides