Feedback In See Periodic Table See Hint The addition of 121 g potassium fluoride to 593...
The addition of 115.0 g potassium fluoride to 605.0 mL of water (d = 1.00 g/ml) causes the temperature to rise 3.91 °C. What is the A Hoxn for KF? (Assume cp = 4.18 J/g °C.) * 11.78 kJ/mol
The addition of 117 g potassium fluoride to 601 mL of water (d = 1.00 g/ml) causes the temperature to rise 3.50 °C. What is the AHgoln for KF? kJ/mol Exactly 19.5 mL of water at 34.0°C is added to a hot iron skillet. All of the water is converted to steam at 100.0°C. The mass of the skillet is 1.30 kg. What is the change in temperature of the skillet? "С
Feedback See Periodic Table O See Hint What is the pH of a solution made by dissolving 6.86 grams of calcium fluoride in enough water to make 590 mL of solution? The K, for HF is 6.8x10-4 ® 2.8
11 Question (1 point) 1st attempt Feedback lud See Periodic Table See Hint AO.SOO M solution of potassium hydroxide is used to titrate citric acid (citric acid has three acidic hydrogens per molecule). How many mL of potassium hydroxide will be needed to neutralize 2.95 g of citric acid? (Citric acid has a molar mass of 192.1 g/mol.) ml SOF 13 QUESTIONS COMPLETED < 11/13 > • VIEW SOLUTION C TRY AGAIN o *
Question (2 points) See page 22 1st attempt See Periodic Table See Hint If all of the energy from burning 318.0 g of propane (A Hcomb.C3H8 --2220 kJ/mol) is used to heat water, how many liters of water can be heated from 20.0°C to 100.0°C? (Assume that the density of water is 1.00 g/ml) L of water < 07/11 D40 ENG 0 OF 11 QUESTIONS COMPLETED e here to search
Ist attempt See Periodic Table O See Hi Calculate the final temperature of 100.0 mL of water (d=1.00 g/mL) at 20.2 °C 1% = 75.3 J/mol·°C)] after adding 100 mL of concentrated HNO3 (14.7 M, AH soln --33.3 kJ/mol).
3rd attempt Feedback See Periodic Table See Hint Exactly 10.5 mL of water at 30.0 °C is added to a hot iron skillet. All of the water is converted to steam at 100.0°C. The mass of the skillet is 1.50 kg. What is the change in temperature of the skillet? 47.82 C 2nd attempt > 1st attempt
Il See Periodic Table See Hin If all of the energy from burning 254.0 g of propane (AHcomb.cana = -2220 kJ/mol) is used to heat water, how many liters of water can be heated from 20.0°C to 100.0°C? (Assume that the density of water is 1.00 g/mL) L of water
w See Periodic Table See Hint Based on the thermodynamic properties provided for water, determine the energy change when the temperature of 0.850 kg of water decreased from 125 °C to 37.0 °C. Units Property Melting point Boiling point Value 0 ΔΗ. kJ/mol kJ/mol A Hvap Co (5) co ( 100.0 6.01 40.67 37.1 75.3 33.6 | J/mol. C J/mol. °C J/mol. C se) 587668 kJ > 1st attempt
6 Question (1point) See page 228 Adding nitric acid to water is quite exothermic. Calculate the temperature change (AT) when 100.0 mL of water (d=1.00 g/mL) at 20.0°C [c-75.3 J/(mol-°C)] and 10.0 mL of concentrated HNO(16.0 M,AHin-33.3 kJ/mol) are combined. 1st attempt See Periodic Table See Hint Assume the concentrated HNO3 has a density equal to that of water and its addition doesn't add a significant amount of water to the system. °C