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An unknown amount of NaCl is dissolved into 100. g of 30 °C water in an insulated container. The temperature of the solution decreases to 27.9 °C. How much salt was dissolved in this particular experiment? The enthalpy change for the reaction is indicated below. NaCi(o) --> NaCI(a) AH = 3.87 kJ/mol O. 15.3 g Ob 10.3 g Oc. 30.5 g O d. 0.0153 g ০ ০. 0.0305 0

An unknown amount of NaCl is dissolved into 100. g of 30 °C water in an insulated container. The temperature of the solution decreases to 27.9 °C. How much salt was dissolved in this particular experiment? The enthalpy change for the reaction is indicated below. NaCi(o) --> NaCI(a) AH = 3.87 kJ/mol O. 15.3 g Ob 10.3 g Oc. 30.5 g O d. 0.0153 g ০ ০. 0.0305 0

Chemistry: Principles and Practice
Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter5: Thermochemistry
Section: Chapter Questions
Problem 5.64QE: Dissolving 6.00 g CaCl2 in 300 mL of water causes the temperature of the solution to increase by...
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An unknown amount of NaCl is dissolved into 100. g of 30 °C water in an insulated container. The temperature of the solution decreases to 27.9 °C. How much salt was dissolved in this particular experiment? The enthalpy change for the reaction is indicated below. NaCi(o) --> NaCi(aa) AH = 3.87 kJ/mol Oa 15.3 g Ob. 10.3 g Oc. 30.5 g Od. 0.0153 g O e. 0.0306 g For which of the following acid solutions will 100.0 ml of the acid solution exactly neutralize 50. ml of a 0.20M Ba(OH), solution? O a 0.050 M hydrochloric acid O b. 0.10 M nitric acid Oc. 0.40 M bromic acid O d. 0.20 M sulfuric acid O e. 0.10 MH2SO3 umo of aas hut
Transcribed Image Text:An unknown amount of NaCl is dissolved into 100. g of 30 °C water in an insulated container. The temperature of the solution decreases to 27.9 °C. How much salt was dissolved in this particular experiment? The enthalpy change for the reaction is indicated below. NaCi(o) --> NaCi(aa) AH = 3.87 kJ/mol Oa 15.3 g Ob. 10.3 g Oc. 30.5 g Od. 0.0153 g O e. 0.0306 g For which of the following acid solutions will 100.0 ml of the acid solution exactly neutralize 50. ml of a 0.20M Ba(OH), solution? O a 0.050 M hydrochloric acid O b. 0.10 M nitric acid Oc. 0.40 M bromic acid O d. 0.20 M sulfuric acid O e. 0.10 MH2SO3 umo of aas hut
A 500. g block of dry ice initially has a temperature of -78.5 °C and is placed into a flexible balloon, The balloon initially has zero volume of gas, but the balloon expands as the reaction shown below proceeds to completion. The balloon finally stops expanding when the gas is at 25 °C. If the external pressure was constant at 1 atm, how much work was performed by the gas during this expansion in kilojoules? 101.3 J= 1L atm. Co2{s) --> CO2lg) AH = 26:0 kJ/mol Oa. -279 kJ O b. -28.2 kJ O c. 28.2 kJ O d. 279 kJ O e. No work is being performed by the gas. Consider an experimental setup where you begin with ice at a temperature of -100 °C, at a pressure of 1 atm. You heat the ice gradually eventually it transitions to liquid water and then to steam that reaches a final temperature of 200 °C. Which of the following statements is false regarding the experiment that was performed in the lab? Use the information provided below, and the freezing point of water is 0°C and the boiling point is 100 °C. Pressure remains constant. Cice 2.093 J/1g 1°C Cwater =4.184 J/1g 1°C Cateam = 2.010 J/191°C AHvaporization 40.8 kJ/mol AHrusion = 6.02 kJ/mol More heat is required to boil one more of water in comparison to melting one mole of ice. O b. More heat was required to bring the water to the boiling point in comparison to bringing the ice to the melting point. O c. The mass of water remained constant throughout the experiment. O d. Heat was released during the boiling process. The temperature of the system remains constant during a phase transition.
Transcribed Image Text:A 500. g block of dry ice initially has a temperature of -78.5 °C and is placed into a flexible balloon, The balloon initially has zero volume of gas, but the balloon expands as the reaction shown below proceeds to completion. The balloon finally stops expanding when the gas is at 25 °C. If the external pressure was constant at 1 atm, how much work was performed by the gas during this expansion in kilojoules? 101.3 J= 1L atm. Co2{s) --> CO2lg) AH = 26:0 kJ/mol Oa. -279 kJ O b. -28.2 kJ O c. 28.2 kJ O d. 279 kJ O e. No work is being performed by the gas. Consider an experimental setup where you begin with ice at a temperature of -100 °C, at a pressure of 1 atm. You heat the ice gradually eventually it transitions to liquid water and then to steam that reaches a final temperature of 200 °C. Which of the following statements is false regarding the experiment that was performed in the lab? Use the information provided below, and the freezing point of water is 0°C and the boiling point is 100 °C. Pressure remains constant. Cice 2.093 J/1g 1°C Cwater =4.184 J/1g 1°C Cateam = 2.010 J/191°C AHvaporization 40.8 kJ/mol AHrusion = 6.02 kJ/mol More heat is required to boil one more of water in comparison to melting one mole of ice. O b. More heat was required to bring the water to the boiling point in comparison to bringing the ice to the melting point. O c. The mass of water remained constant throughout the experiment. O d. Heat was released during the boiling process. The temperature of the system remains constant during a phase transition.
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