The Webster’s Dictionary defines calorimeter as‚ “an apparatus for measuring quantities of absorbed or emitted heat or for determining specific heats.” While direct calorimeters measure the amount of heat produced in a small chamber‚ indirect calorimeters measure the amount of heat produced by taking into account the amount of consumption of oxygen and elimination of carbon dioxide. Both contain the same concept‚ but have a different approach. Indirect calorimetry is the preferable way for physiologists
Premium Energy Heat Thermodynamics
GAS LAWS Properties of Gases Gases expand into any available volume • gas molecules escape from open containers. Gases are completely miscible • once mixed they will not spontaneously separate. Gases are described in terms of T‚ P‚ V and n Volume‚ Amount and Temperature • A gas expands uniformly to fill the container in which it is placed – The volume of the container is the volume of the gas – Volume may be in liters‚ mL‚ or cm3 • The temperature of a gas must be indicated
Free Pressure Ideal gas law Gas
Gas Exchange To complete this worksheet‚ select: Module: Gas Exchange and pH Balance Activity: Animations Title: Gas Exchange Introduction 1. a. Describe the respiratory system role with oxygen and carbon dioxide. The respiratory system is responsible for the movement of gases involved in cellular metabolism. b. Why is oxygen needed? Oxygen is needed because it is used up during the aerobic breakdown of glucose. c. What generates CO2? Carbon dioxide arises from the aerobic
Premium Oxygen Carbon dioxide Blood
Gas analysis techniques Terms for gas analysis techniques Concentration The term concentration describes the amount of a substance‚ expressed as mass‚ volume‚ or number of particles in a unit volume of a solid‚ liquid‚ or gaseous substance e.g. alcohol in beer or oxygen in air. Different units are in use to describe concentration in gases: Mass concentration Concentration expressed in terms of mass of substance per unit volume [g substance/m3 gas volume] ¢ Volume concentration Concentration
Premium Pressure Air pollution Gas
reaction conducted in this lab‚ including appropriate phase symbols. Mg(s) + 2HCl(aq) --> H2(g) + MgCl2(aq) 2. Determine the partial pressure of the hydrogen gas collected in the gas collection tube. The partial pressure of the hydrogen gas is 1.07 atm 3. Calculate the moles of hydrogen gas collected. pv=mrt ; n= .0013mol of hydrogen gas 4. If magnesium was the limiting reactant in this lab‚ calculate the theoretical yield of the gaseous product. Show all steps of your calculation. 0.03184 g
Premium Pressure Gas Oxygen
and their uses Exploration milestone-an overview. INTRODUCTION: By definition petroleum is a generic name for hydrocarbons‚ including crude oil‚ natural gas liquids‚ natural gas and their products. Petroleum comes from the Latin petra meaning rock or stone & oleum meaning oil. Petroleum occurs in the earth in combination of any of the four states: gas‚ liquid‚ semisolid‚ and solid. Chemically‚ petroleum is a mixture of carbon‚ hydrogen and oxygen (called hydrocarbons) with minor amounts of nitrogen
Premium Petroleum
Analysts expect gas prices to decrease or remain mostly flat not only in 2014‚ but for years to come. Nonetheless‚ drivers in some states will see higher prices at the pump‚ starting January 1. Gas prices may not have seemed all that cheap in 2013. But in fact‚ prices for the year as a whole were less expensive than they have been. According toAAA’s year-end report‚ American drivers paid $3.49 per gallon of regular‚ on average for 2013. That’s the cheapest per-gallon average since 2010; the national
Premium Diesel fuel Gasoline Price
of alcohol burnt CONTROLLED VARIABLES: • The length of the wick coming from the spirit burner • Distance of the wick from the bottom of the aluminium can • Temperature change of the water in the aluminium can • Can used as calorimeter • Mass of water in calorimeter • The room temperature (environment) It is important that the controlled variables are all kept the same because it makes the experiment more reliable and accurate. Ways to ensure that the controls are kept the same is to record
Premium Oxygen Temperature Carbon dioxide
Review the behavior of the gas phase vs. the liquid phase. Solution: a) The volume of the liquid remains constant‚ but the volume of the gas increases to the volume of the larger container. b) The volume of the container holding the gas sample increases when heated‚ but the volume of the container holding the liquid sample remains essentially constant when heated. c) The volume of the liquid remains essentially constant‚ but the volume of the gas is reduced. The particles in a gas are further apart than
Free Pressure Ideal gas law Gas
United States Gulf of Mexico Oil and Natural Gas Industry Economic Impact Analysis The Economic Impacts of GOM Oil and Natural Gas Development on the U.S. Economy Prepared by: Quest Offshore Resources‚ Inc. Prepared for: 1600 Highway 6‚ Suite 300 American Petroleum Institute (API) Sugar Land‚ TX 77478 National Ocean Industries Association (NOIA) June 2011 Key Findings This report has documented the decline in generate tax revenues at all levels of capital operational
Premium Natural gas