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3 NaOH(aq) + H;PO4(aq) → Na;PO3(aq) + 3 H2O(1) AH = -173.7 kJ 1. If 31.2 mL of 0.45 M sodium hydroxide is mixed with 65.4 mL of 0.088 M phosphoric acid, how many kJ of heat are produced? 0.45=31.2-140Amo) sedum hydrode Amo) sedun hydronde Himihingreacland 0.00575 ml IH3PO4x 3mol NaOlt 2. When the above solutions are mixed, what final temperature should we expect the solution to reach? Assume the combined solution has the same density (1 g/mL) and heat capacity (4.184 J/g.°C) as water and that it is initially at 22.4 °C. Notice that for Part A of this lab, the temperature of the system and the surroundings both increased; however, for Part B, the temperature of the system decreased while that of the surroundings increased. What is the difference? Where did the energy come from in Part A? In Part B?

3 NaOH(aq) + H;PO4(aq) → Na;PO3(aq) + 3 H2O(1) AH = -173.7 kJ 1. If 31.2 mL of 0.45 M sodium hydroxide is mixed with 65.4 mL of 0.088 M phosphoric acid, how many kJ of heat are produced? 0.45=31.2-140Amo) sedum hydrode Amo) sedun hydronde Himihingreacland 0.00575 ml IH3PO4x 3mol NaOlt 2. When the above solutions are mixed, what final temperature should we expect the solution to reach? Assume the combined solution has the same density (1 g/mL) and heat capacity (4.184 J/g.°C) as water and that it is initially at 22.4 °C. Notice that for Part A of this lab, the temperature of the system and the surroundings both increased; however, for Part B, the temperature of the system decreased while that of the surroundings increased. What is the difference? Where did the energy come from in Part A? In Part B?

Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter5: Principles Of Chemical Reactivity: Energy And Chemical Reactions
Section5.6: Calorimetry
Problem 5.7CYU: Assume 200. mL of 0.400 M HCl is mixed with 200. mL of 0.400 M NaOH in a coffee-cup calorimeter The...
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3 NaOH(aq) + H;PO4(aq) → Na;PO3(aq) + 3 H2O(1) AH = -173.7 kJ 1. If 31.2 mL of 0.45 M sodium hydroxide is mixed with 65.4 mL of 0.088 M phosphoric acid, how many kJ of heat are produced? 0.45=31.2-140Amo) sedum hydrode Amo) sedun hydronde Himihingreacland 0.00575 ml IH3PO4x 3mol NaOlt 2. When the above solutions are mixed, what final temperature should we expect the solution to reach? Assume the combined solution has the same density (1 g/mL) and heat capacity (4.184 J/g.°C) as water and that it is initially at 22.4 °C. Notice that for Part A of this lab, the temperature of the system and the surroundings both increased; however, for Part B, the temperature of the system decreased while that of the surroundings increased. What is the difference? Where did the energy come from in Part A? In Part B?
Transcribed Image Text:3 NaOH(aq) + H;PO4(aq) → Na;PO3(aq) + 3 H2O(1) AH = -173.7 kJ 1. If 31.2 mL of 0.45 M sodium hydroxide is mixed with 65.4 mL of 0.088 M phosphoric acid, how many kJ of heat are produced? 0.45=31.2-140Amo) sedum hydrode Amo) sedun hydronde Himihingreacland 0.00575 ml IH3PO4x 3mol NaOlt 2. When the above solutions are mixed, what final temperature should we expect the solution to reach? Assume the combined solution has the same density (1 g/mL) and heat capacity (4.184 J/g.°C) as water and that it is initially at 22.4 °C. Notice that for Part A of this lab, the temperature of the system and the surroundings both increased; however, for Part B, the temperature of the system decreased while that of the surroundings increased. What is the difference? Where did the energy come from in Part A? In Part B?
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