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Thermogravimetry (TG) and Differential Scanning Calorimetry (DSC) are commonly used techniques to study the properties of materials at different temperatures.
(a) Describe what type of information is recorded during the measurement of TG and DSC. Use following format of sentences for your answers. During the TG measurement, ........ is recorded. During the DSC measurement, ........ is recorded.
(b) Draw expected results if powder samples of Al2O3 and SiO2 are studied using TG and DSC in the temperature range of 30 - 1500 oC. Please provide brief explanations of the expected results.
(c) Which technique (TG or DSC) is more beneficial to study these materials in this temperature range? Please provide your answers for each of Al2O3 and SiO2 with explanations.
What are the spectator ions in the solution after completely precipitating an insoluble carbonate compound when mixing BaCl2(aq)
a)Calculate the final temperature for Cv,m=3R/2.b)Calculate q for Cv,m=3R/2 .c)Calculate w for Cv,m=3R/2 d)Calculate delta H for Cv,m=3R/2 e)Calculate delta U for Cv,m=3R/2
7.3 { mol} of helium are in a 18 { L} cylinder. The pressure gauge on the cylinder reads 67 {psi}. What are (a) the temperature of the gas in degrees Celsius and (b) the average kinetic energy of a helium atom in Joules
The rate law for a hypothetical reaction is rate=k[a]2. when the concentration is .10 moles/liter, the rate is 2.7 times 10-5 moles/liter second. what is the value of k?
The compounds BR2 and ICl have the ame number of electrons, yet Br2 melts at -7.2 C and ICl melts at 27.2 C. Explain.
What is the most significant intermolecular attraction in a pure sample of CH3F
If you have 330 ml of water at 25 degrees and add 110 ml of water at 95 degrees, What is the final temperature of the mixture.
You found that pH=pKa=4.2 when 12.50 mL of NaOH hadbeen added. The concentration of the sodium hydroxide was 0.500M. Calculate the initial percent dissociation of the acidsample.
Ozonolysis of a single enantiomer of R produces S, an acyclic, optically active ketoaldehyde of formula C6H10O2. Propose structures for compounds Q, R, and S. Do not label them; simply draw all three of them in the space provided in any order.
compressed gas cylinder contains 1.00 x 10^3 g of argon gas. The pressure inside the cylinder is 2050 psi at a temperature of 18 C.
how many millimoles of HNO3 are needed to react completely with a .2800 gram piece of copper wire.
Write the equation for the formation of ethyl acetate, What is the purpose of sulfuric acid? What happens if water is removed from the reaction mixture.
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