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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M10/4/PHYSI/SP2/ENG/TZ1/XX+ 22106511 Physics standard level PaPer 2 Candidate session number Monday 10 May 2010 (afternoon) 0 1 hour 15 minutes 0 INSTRUCTIONS TO CANDIDATES • • • • • Write your session number in the boxes above. Do not open this examination paper until instructed to do so. Section A: answer all of Section A in the spaces provided. Section B: answer one question from Section B in the spaces provided. At the end of the examination‚ indicate the
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and 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
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info/page07/delta2H.htm>. Kawamura‚ Yoko‚ Ph.D. "MAGNESIUM SULFATE Chemical and Technical Assessment." Diss. Ed. Madduri V. Rao‚ Ph.D. 2007. JECFA. Web. <http://www.fao.org/fileadmin/templates/agns/pdf/jecfa/cta/68/Magnesium_Sulfate.pdf>. "Specific Heat." Specific Heat. N.p.‚ n.d. Web. 14 Jan. 2014. <http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/spht.html>.
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convection process rather than mechanical transmitting source‚ which captures the heat energy of sun and delivers it during winter and pumps out the heat in summer‚ using heat distribution methods. Some of the heat distribution methods are Convection‚ Conduction‚ and Radiation. However components of passive solar heating are‚ the aperture area of the house‚ absorber area of the house‚ thermal mass of the house‚ heat distribution‚ and solar control. When these components work together it contributes
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is heated‚ it will release much more heat than the popcorn. This will be the result as the Dorito has more mass than Popcorn as well as more carbohydrates. It would take about 4-5 Dorito’s or 15 Popcorn to boil 250mL of water. [Signature of teacher: ________wwt_______________] Variables: Table 1: Independent Variable | Dependent Variable | Controlled Variables | The material was changed from a Dorito chip to a singular piece of popcorn. | The heat of the boiling-tube will be measured
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more energy in combustion reaction than the less alcoholic hydrocarbons compounds. Equipment: Different types of alcohols in spirit burner (CH4‚ C2H6‚ C3H8‚ C4H10‚ C5H12)‚ Thermometer‚ water‚ beaker‚ scale‚ measuring cylinder‚ tripods‚ clamp‚ gauze‚ heat mat‚ lighter or matches. Hazard: Most of alcohol we using are flammable‚ irritant‚ toxic and harmful. 1 provide spirit burners which have removable glass caps‚ this makes it easier and safer to extinguish the flames. 2 Make sure the wick fits tightly
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An intensive property is a physical quantity whose value does not depend on the amount of the substance for which it is measured. For example‚ the temperature of a system in thermal equilibrium is the same as the temperature of any part of it. If the system is divided the temperature of each subsystem is identical. The same applies to the density of a homogeneous system: if the system is divided in half‚ the mass and the volume change in the identical ratio and the density remains unchanged. According
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solution. � CHEMICAL Sodium Hydroxide (NaOH) PROCEDURE The recommended amount of compound ito use is around 0.1 moles. Add water into your caleriometer Add the solid salt and stir the mixture thoroughly and continuously. Calculate ΔHsol. Ignore the heat capacity of the caleriometer. _Results_ RAW DATA Tab.1. The different data required for the calculations. Trial Mass of NaOH / g (± 0.001 g) Volume of H2O / ml (± 1 ml) Initial Temperature / °C (± 1 °C) Final Temperature / °C (± 1 °C)
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Data collection and processing Qualitative observation Before * Blue solution of copper sulfate * Grey zinc powder During * Blue color solution changes to greyish black * Heat is given out‚ so the surroundings become hotter. After * Grey powder remains on the sides of the cup * Precipitate formed at the bottom of the cup List of chemicals and apparatus used Chemicals used Copper sulfate solution‚ 1 mol dm-3 25g of zinc powder Apparatus needed
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