1 Heat and Gases Chapter 1 Temperature and Thermometers New Senior Secondary Physics at Work Oxford University Press 2009 1 1 Temperature and Thermometers Practice 1.1 (p. 10) 1 B 2 D 3 A 4 Temperature is a measure of the degree of hotness of an object. 5 (a) On the Celsius temperature scale‚ the lower fixed point is the ice point (0 C) and the upper fixed point is the steam point (100 C). (b) We can reproduce the lower and upper fixed points by using pure melting ice and pure
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Naphtha are assumed to be stored at 303 K Specific Heat capacity of naphtha is assumed to be 3.5235 kcal/kmol Specific Heat capacity of Hydrogen =(6.62+0.00081T) kcal/kmol K ∆H = ∑ ni ∫ C pi dT = 6.015915 x10 6 kcal hr i Hence heat required to raise their temperature from 303 K to 693 K Assuming that the fuel used is Natural gas (calorific value = 39383.82 kJ/m3) Thus amount of fuel needed to supply this quantity of heat =152.75 m3/hr Heat liberated within the reactor due to reaction = 1414
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Atoms and Molecules Basic units of EVERYTHING! Which of these is true? 1. “Atom” and “molecule” mean the same thing. 2. Atoms are made of molecules. 3. Molecules are made of atoms. What is the smallest structure in this list that can be seen with an ordinary desk microscope? 1. 2. 3. 4. Cells. Cell nucleus. Atoms. Chain molecules‚ such as proteins. Atoms In our model of scale‚ remember that the BB represented an atom. Electrons Hydrogen Helium Neutrons Protons As a class‚ identify
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17 January 2013 Aim: The aim of the experiment is to understand physical and chemical changes of different matters under the influence of heat. And use the metric system to measure length‚ volume and weight. Procedure: Please refer to the laboratory manual pages 8-‐10. Results:
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do we depend on our cars to get us where we want to go‚ we also depend on them to get us there without discomfort. We expect the heater to keep us warm when it’s cold outside‚ and the air conditioning system to keep us cool when it’s hot. We get heat from the heater core‚ sort of a secondary radiator‚ which is part of the car’ cooling system. We get air conditioning from the car’s elaborate air conditioning system. Despite its relatively small size‚ the cooling system has to deal with an enormous
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Introduction Notes What is Science? Study of/tool to understand/body of knowledge/process to understand the natural world What do Scientists do? Make observations Attempt to discern patters Assume the future is like the past What is Biology? The study of life What is Life? Not ever clearly defined Characteristics of living systems: Highly organized Huge energy users 90% of food we eat is used to keep us going Development Development from a single cell to billons of cells Reproduction
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COMPOUNDS: 1. Water cces2013 10 The CELL: Chemical Components INORGANIC COMPOUNDS: 1. Water Unique Properties: a. Cohesion b. Adhesion c. Surface tension d. Capillary action e. universal solvent cces2013 f. High specific heat g. high heat of vaporization h. Forms ice with decrease in temp 11 The CELL: Chemical Components INORGANIC COMPOUNDS: 1. Water Unique Properties necessary for life: a. Cohesion: water molecules stick to each other cces2013 12 The CELL: Chemical
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WHAT IS FUMIGATION? Fumigation is the process by which a lethal chemical is released into an enclosed area to eliminate an infestation of pests. This process may be used in order to rid a home or other structure of insects such as termites or roaches‚ but it may also be used when products are being processed for export or import in order to rid the goods of exotic pests and organisms. Fumigants are a unique and particularly valuable group of pesticides that can kill insects where no other form
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absorbs heat from the surroundings from the circulating fluid (being refrigerated) and vaporizes into low pressure vapor at state B. The cycle then repeats. The exchange of energy is as follows: Indian Institute of Technology Madras Refrigeration Cycles Prof. U.S.P. Shet ‚ Prof. T. Sundararajan and Prof. J.M . Mallikarjuna a) Compressor requires work‚ δw. The work is supplied to the system from the surroundings. b) During condensation‚ heat δQ1 the equivalent of latent heat of condensation
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Helsinki University of Technology Department of Mechanical Engineering Energy Engineering and Environmental Protection Publications Steam Boiler Technology eBook Espoo 2002 Basics of Steam Generation Sebastian Teir Helsinki University of Technology Department of Mechanical Engineering Energy Engineering and Environmental Protection Table of contents Introduction.......................................................................................................................
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