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home study scence chemistry general chemistry / general chemistry solutions manuals/ chemistry 10th edition / Chapter 5 problem 190 Chemistry (0th Edition) Soe this solution in the app Chapter 5 Problem 19E Show all steps: OFF Proble Calorimetry How much will the temperature of a cup (180 g) of coffee at 95 °C be reduced when a 45 g silver Spoon (specific heat 0.24 J/g °C) at 25 C is placed in the coffee and the two are allowed to...
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How much heat is absorbed in the complete reaction of 3.00 grams of SiO2 with excess carbon in the reaction below? DH0 for the reaction is +624.6 kJ.SiO2(g) + 3C(s) ® SiC(s) + 2CO(g)A) 366 kJB.) 1.13 ´ 105 kJC.) 5.06 kJD.) 1.33 ´ 104 kJE.) 31.2 kJ
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hydrazine (N2H4) decomposes according to the following reaction:3N2H4 yields 4NH3 + N2(a) Given that the standard enthalpy of formation of Hydrazine is 50.42 kJ/mol, calculate delta H for its composition.(b) Both hydrazine and ammonia burn in oxygen to produce H2O(l) and N2(g). Write a balanced equation for each of these processes, and calculate delta H for each ofthem.(c) On a mass basis (per kg), which would be the better fuel: hydrazine or ammonia?

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When backpacking in the wilderness, hikers often boil water to sterilize it for drinking. Suppose that you are planning a backpacking trip and will need to boil 34 Lof water for your group.What volume of fuel should you bring? Assume each of the following: the fuel has an average formula of C7H16; 15% of the heat generated from combustion goes to heatthe water (the rest is lost to the surroundings); the density of the fuel is 0.78 g/mL; the initial...
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An exothermic reaction liberates 7.58 kJ of heat in a coffee cup calorimeter containing 157 grams of solution. The temperature of the solution in the calorimeterincreases by 11.2°C. How much heat was absorbed by the calorimeter? Assume the specific heat of the solution is 4.184 J/g·°C.223 J7.36 kJ657 J5820 J-223 J
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You carefully weigh out 18.00 grams of CaCO_3 powder and add it to 72.90 of solution. You notice bubbles as a reaction takes place. You then weigh the resultingsolution and find that it has a mass of 83.52 . The relevant equation is Assuming no other reactions take place, what mass of was produced in this reaction?

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A particular first-order reaction has a rate constant of 1.35 × 102 s-1 at 25.0°C. What is the magnitude of k at 85.0°C if Ea= 55.5 kJ/mol?
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The reaction of water and coal at a high temperature produces a mixture of hydrogen and carbon monoxide gases. This mixture is known as synthesis gas (or syngas). Whatmass of hydrogen gas can be formed from the reaction of 51.3 g of carbon with excess water?C(s) + H2O(g) ? H2(g) + CO(g)
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At 25°C a solution consists of 0.450 mole of pentane, C5H12, and 0.250 mole of cyclopentane, C5H10. What is the lowering of the vapor pressure of pentane in thissolution? The vapor pressure of the pure liquids at 25°C are 451 torr for pentane and 321 torr for cyclopentane. Assume that the solution is an ideal solution.115 torr138 torr161 torr187 torr206 torr

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How many moles of chloroethylene (C2H3Cl) contain 5.47 × 1026 molecules?