Bundle: Chemistry: The Molecular Science, 5th, Loose-Leaf + OWLv2 with Quick Prep 24-Months Printed Access Card
5th Edition
ISBN: 9781305367487
Author: John W. Moore, Conrad L. Stanitski
Publisher: Cengage Learning
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Chapter 4, Problem 19QRT
Solid ammonium chloride is added to water in a beaker and dissolves. The beaker becomes cold to the touch.
- (a) Make an appropriate choice of system and surroundings and describe it unambiguously.
- (b) Explain why you chose the system and surroundings you did.
- (c) Identify transfers of energy and material into and out of the system that would be important for you to monitor in your study.
- (d) Is the process of dissolving NH4Cl(s) in water exothermic or endothermic? Explain your answer.
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13.4 g of NH4Cl is dissolved in 150 mLof water in a coffee-cup calorimeter, and the temperature of the solution decreases from 24.80°C to 18.95°C.
(a) Calculate the enthalpy change for the dissolution of this sample of NH4Cl in J.
(b) What would be the enthalpy change for dissolving one mole of NH4Cl in kJ/mol?
Note that the specific heat capacity of water is 4.186J/g·K and its density is 1.00 g/mL. Remember that the heat gained by the water is heat that is lost by the system.
I have attached an image of the question.
Two solids, 5.00 g of NaOH and 4.20 g of KOH, are added to 150 mL of water at 23 °C in a calorimeter. Given Hsoln,NaOH = 44.3 kJ/mol and Hsoln,KOH = 56.0 kJ/mol,
(a) On a per gram basis, which solid will cause a greater water temperature increase? (b) What is the final temperature of the solution?
Chapter 4 Solutions
Bundle: Chemistry: The Molecular Science, 5th, Loose-Leaf + OWLv2 with Quick Prep 24-Months Printed Access Card
Ch. 4.1 - (a) If you eat a hot dog, it will provide 160...Ch. 4.2 - Prob. 4.1CECh. 4.2 - Prob. 4.2CECh. 4.3 - Prob. 4.3CECh. 4.3 - Prob. 4.2PSPCh. 4.4 - A piece of aluminum with a mass of 250. g is at an...Ch. 4.4 - Prob. 4.4CECh. 4.4 - Prob. 4.5CECh. 4.4 - Prob. 4.4PSPCh. 4.4 - Prob. 4.5PSP
Ch. 4.5 - Prob. 4.6PSPCh. 4.5 - Prob. 4.6ECh. 4.5 - Assume you have 1 cup of ice (237 g) at 0.0 C....Ch. 4.6 - Prob. 4.9CECh. 4.6 - Prob. 4.10CECh. 4.6 - Prob. 4.11ECh. 4.6 - The reaction enthalpy for sublimation of 1 mol...Ch. 4.6 - Prob. 4.12ECh. 4.6 - Prob. 4.8PSPCh. 4.7 - Prob. 4.13CECh. 4.7 - Prob. 4.14CECh. 4.8 - Prob. 4.9PSPCh. 4.8 - Prob. 4.15CECh. 4.8 - Prob. 4.10PSPCh. 4.8 - Prob. 4.16CECh. 4.8 - Prob. 4.17ECh. 4.9 - When iron is obtained from iron ore, an important...Ch. 4.10 - Write an appropriate thermochemical expression in...Ch. 4.10 - Prob. 4.18CECh. 4.10 - Prob. 4.13PSPCh. 4.10 - Use data from Table 4.2 to calculate the standard...Ch. 4.11 - Prob. 4.15PSPCh. 4.11 - Correlate the fuel values and caloric values...Ch. 4.11 - Prob. 4.20ECh. 4.11 - Prob. 4.21ECh. 4 - Prob. 1QRTCh. 4 - For each situation, define a system and its...Ch. 4 - What is the value of the standard formation...Ch. 4 - Prob. 4QRTCh. 4 - Prob. 5QRTCh. 4 - Name two exothermic processes and two endothermic...Ch. 4 - Prob. 7QRTCh. 4 - Prob. 8QRTCh. 4 - (a) A 2-inch piece of two-layer chocolate cake...Ch. 4 - Prob. 10QRTCh. 4 - Melting lead requires 5.50 cal/g. Calculate how...Ch. 4 - Prob. 12QRTCh. 4 - Prob. 13QRTCh. 4 - Prob. 14QRTCh. 4 - Prob. 15QRTCh. 4 - Analyze transfer of energy from one form to...Ch. 4 - Prob. 17QRTCh. 4 - Suppose that you are studying kinetic energy of...Ch. 4 - Solid ammonium chloride is added to water in a...Ch. 4 - Prob. 20QRTCh. 4 - Prob. 21QRTCh. 4 - Prob. 22QRTCh. 4 - Prob. 23QRTCh. 4 - Prob. 24QRTCh. 4 - Prob. 25QRTCh. 4 - Prob. 26QRTCh. 4 - The specific heat capacity of benzene, C6H6, is...Ch. 4 - The specific heat capacity of carbon...Ch. 4 - Prob. 29QRTCh. 4 - Prob. 30QRTCh. 4 - A piece of iron (400. g) is heated in a flame and...Ch. 4 - Prob. 32QRTCh. 4 - Prob. 33QRTCh. 4 - Prob. 34QRTCh. 4 - Prob. 35QRTCh. 4 - Prob. 36QRTCh. 4 - Prob. 37QRTCh. 4 - Prob. 38QRTCh. 4 - Prob. 39QRTCh. 4 - Calculate the quantity of heating required to...Ch. 4 - Prob. 41QRTCh. 4 - Prob. 42QRTCh. 4 - Prob. 43QRTCh. 4 - Prob. 44QRTCh. 4 - Prob. 45QRTCh. 4 - Calcium carbide, CaC2, is manufactured by reducing...Ch. 4 - Prob. 47QRTCh. 4 - Prob. 48QRTCh. 4 - Prob. 49QRTCh. 4 - Given the thermochemical expression CaO(s) + 3C(s)...Ch. 4 - Prob. 51QRTCh. 4 - Prob. 52QRTCh. 4 - Isooctane (2,2,4-trimethylpentane), one of the...Ch. 4 - Prob. 54QRTCh. 4 - Gasohol, a mixture of gasoline and ethanol,...Ch. 4 - White phosphorus, P4, ignites in air to produce...Ch. 4 - Prob. 57QRTCh. 4 - Prob. 58QRTCh. 4 - Which molecule, HF, HCl, HBr, or HI, has the...Ch. 4 - Which molecule, F2, Cl2, Br2, or I2, has the...Ch. 4 - For the reactions of molecular hydrogen with...Ch. 4 - Prob. 62QRTCh. 4 - A diamond can be considered a giant all-carbon...Ch. 4 - Prob. 64QRTCh. 4 - Prob. 65QRTCh. 4 - Prob. 66QRTCh. 4 - Prob. 67QRTCh. 4 - A 0.692-g sample of glucose, C6H12O6, is burned in...Ch. 4 - Benzoic acid, C7H6O2, occurs naturally in many...Ch. 4 - Prob. 70QRTCh. 4 - Prob. 71QRTCh. 4 - Prob. 72QRTCh. 4 - Three reactions very important to the...Ch. 4 - Prob. 74QRTCh. 4 - Prob. 75QRTCh. 4 - Prob. 76QRTCh. 4 - Prob. 77QRTCh. 4 - Prob. 78QRTCh. 4 - We burn 3.47 g lithium in excess oxygen at...Ch. 4 - Prob. 80QRTCh. 4 - Prob. 81QRTCh. 4 - Prob. 82QRTCh. 4 - The reaction enthalpy for oxidation of styrene,...Ch. 4 - Oxygen is not normally found in positive oxidation...Ch. 4 - Iron can react with oxygen to give iron(III)...Ch. 4 - The formation of aluminum oxide from its elements...Ch. 4 - Prob. 87QRTCh. 4 - If you want to convert 56.0 g ice (at 0 °C) to...Ch. 4 - Prob. 89QRTCh. 4 - Prob. 90QRTCh. 4 - Prob. 91QRTCh. 4 - Prob. 92QRTCh. 4 - Prob. 93QRTCh. 4 - Prob. 94QRTCh. 4 - Prob. 95QRTCh. 4 - Prob. 96QRTCh. 4 - Prob. 97QRTCh. 4 - Prob. 98QRTCh. 4 - Prob. 99QRTCh. 4 - Prob. 100QRTCh. 4 - Prob. 101QRTCh. 4 - Prob. 102QRTCh. 4 - Prob. 103QRTCh. 4 - Prob. 104QRTCh. 4 - Prob. 105QRTCh. 4 - Prob. 106QRTCh. 4 - The specific heat capacity of copper is 0.385 J g1...Ch. 4 - Consider this graph, which presents data for a...Ch. 4 - Prob. 109QRTCh. 4 - The sketch shows two identical beakers with...Ch. 4 - Prob. 111QRTCh. 4 - Prob. 112QRTCh. 4 - Prob. 113QRTCh. 4 - Prob. 114QRTCh. 4 - Prob. 115QRTCh. 4 - Prob. 116QRTCh. 4 - Prob. 117QRTCh. 4 - Prob. 118QRTCh. 4 - Prob. 119QRTCh. 4 - Prob. 120QRTCh. 4 - Prob. 121QRTCh. 4 - Prob. 122QRTCh. 4 - Prob. 123QRTCh. 4 - Prob. 124QRTCh. 4 - Prob. 4.ACPCh. 4 - Prob. 4.BCPCh. 4 - Prob. 4.CCPCh. 4 - Prob. 4.DCPCh. 4 - Prob. 4.ECPCh. 4 - Prob. 4.FCP
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