Trial 1 Trial 2 Mass of ice Mce (grams) 79 79 Mass of warm water 120 119 Mwater (grams) Initial temperature of water Tinitial (°C) 41 42 Final temperature of mixture Tfinal (°C) -4 1 Calculated heat of fusion of ice 72.4 60.8 Lexperimental (cal/g) Standard value of heat of fusion of ice L,standard (cal/g) 79.7 79.7 Percentage error 9.22% 23.76%

Trial 1 Trial 2 Mass of ice Mce (grams) 79 79 Mass of warm water 120 119 Mwater (grams) Initial temperature of water Tinitial (°C) 41 42 Final temperature of mixture Tfinal (°C) -4 1 Calculated heat of fusion of ice 72.4 60.8 Lexperimental (cal/g) Standard value of heat of fusion of ice L,standard (cal/g) 79.7 79.7 Percentage error 9.22% 23.76%

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Answer “C”
For each of your three trials state the following: heat needed to melt the ice (q), enthalpy of fusion, and percent error from the accepted enthalpy of fusion of water of 334 J/g Trail 1: Heat needed: 22.0, Enthalpy of Fusion: 469 J/g, Percent Error: 29% Trail 2: Heat needed: 18.0, Enthalpy of Fusion: 399 J/g, Percent Error: 19% Trail 3: Heat needed: 20.0, Enthalpy of fusion: 376 J/g, Percent Error: 13% ((List three sources of error that could account for the differences between your values for the enthalpy of fusion of water and the accepted value of 334 J/g.)) (ONLY QUESTION THAT I NEED HELP WITH) What was your average percent error for all three trials? In this experiment you did three trials. Why was it suggested that you do three trials and not fewer? The average percent error was 20.3% In all experiments you should have more than one trial if you can. It helps make your data more accurate because if you do it once, but something went wrong, all of your data is wrong.
How much heat energy, in kilojoules, is required to convert 37.0 g of ice at -18.0°C to water at 25.0°C ? Express your answer to three significant figures and include the appropriate units. View Available Hint(s) μÃ Value Units P ?
After the sinking of RMS Titanic, US operated the International Ice patrolwith the purpose of monitoring the presence and movements of icebergsin the Atlantic and Arctic oceans. Once, they observed a unique tabulariceberg in a form of a rectangle (250 km x 50 km x 300 m). How manyyears would it take to melt the iceberg solely by heat from the sun if theice absorbs a mean of 98 J/m^2-s, 12.5 hrs per day? Note: the exposed area for heating is 250 km x 50 km and the density is 920 kg/m^3.
How much energy is required to melt 393 g of ice into liquid water at 0 °C? The heat of fusion for water is 333.6 J/g. energy required: about us privacy policy terms of use contact us help careers 2oom22.pdf Quiz #21 (Online)..pdf A Module 10 Suppo..pdf Purchase Receipt.pdf Show All MacBook Air II ER A F10 F9 2$ 4 2# % & * 3 5 6 7 8 9 de E T Y F K C V command option B
5. In the freezing process of water liquid at 273K, the molar heat of freezing (AHf = 6090 J/mole). If the molar volume of water liquid = 18 cm3 and the molar volume of ice water 19.2 cm3, at what temperature will water freezes at a change of pressure when (AP = 5.0 atm)? liquid H20 %3D H20 ice Tf =-0.156 oC O Tf = 0315 oc OT0268 oC O T0167 oC
Question 10 of 23 Submit For pentane, the AH° of vaporization is 26.22 kJ/mol and the AS° of vaporization is 87.88 J/mol · K. At 1.00 atm and 235 K, what is the AG° of vaporization for pentane, in kJ/ mol? |KJ/mol 1 2 3 4 C 7 8 9 +/- х 100 Tap here or pull up for additional resources LO
2:42 PM Mon Jan 30 The normal boiling point of a liquid is 282.0 °C. What is the vapor pressure of this liquid at 136.0 °C in atm? (AHvap = 28.5 kJ/mol) Tap here or pull up for additional resources Question 18 of 20 @ (T)
For the following reactions, predict the products and write the complete balanced chemical equation, even if the reaction does not occur. Then, if no reaction occurs, write "No Rxn". If the reaction does occur, write the complete ionic and net lonic equations, Including all phase symbols and 6. charges. a. (NHA) POa(aq) + BaCl(aq) > Complete ionic Net ionic b. H2SO4 (aq) +. NaOH (aq) Complete ionic Net ionic C. LiBr(aq) Pb(NO3)2(aq) –→ Complete ionic
Solve the following problems following the method shown above. Useful Information: Specific heat of water, H20() = 4.18 J/g-"C Specific heat of ice, H20(s) = 2.04 J/g.C Specific heat of steam, H2O(g) = 2.00 J/g.C Heat of fusion of ice (0°C) = 334 J/g Heat of vaporization of water (100°C) = 2260 J/g Heat of condensation of water = 2260 J/g 4. Calculate the number of joules needed to turn 325 grams of water at 100°C to steam at 100°C. 5. Calculate the heat released when 875 grams of water at 0.0°C turns to ice at 0.0°C. 6. Calculate the number of joules needed to vaporize 2.00 x 102 grams of liquid ammonia at its boiling point and produce ammonia vapor at the same temperature. The heat of vaporization of liquid ammonia is 1374 J/g. 7. How much heat is needed to melt 25.4 g of iodine? Hr = 61.7 J/g. 8. How much heat is needed to melt 4.24 g of Pd? Hr = 162 J/g.
Part B How much heat is required to convert 20.0 g of ethanol at -145 °C to the vapor phase at 78 °C? Express your answer in kilojoules to two significant figures. IV— ΑΣΦ Submit Request Answer E ? kJ
A 200.0 g of tin released 394 calories (cal.) of heat when cooled from 100.0°C to 24.5°C. What is the specific heat of the metal? A) 0.0394 cal/(g x °C) B) 0.0261 cal/(g x °C) C) 19.2 cal/(g x °C) D) 5.220 cal/(g x °C) E) 0.161 cal/(g x °C)