E Give Up? = 21 of 28 Questions O Assignment Score: O Hint 84.7% Check Answer Resources U 13 queaLIUIT υυνο 1 of o Attempts Correct < Question 21 of 28 O 14 Question Calculate the heat energy released when 15.9 g of liquid 100% Constants for mercury at 1 atm 1 of o Attempts mercury at 25.00 °C is converted to solid mercury at its Correct heat capacity of Hg(1) 28.0 J/(mol-K) melting point. melting point 234.32 K O 15 Question 95% enthalpy of fusion 2.29 kJ/mol 2 of oo Attempts Correct O 16 Question 100% 1 of oo Attempts Correct kJ qp = O 17 Question 100% 1 of o Attempts Correct 18 Question O of oo Attempts 0% O 19 Question 100% 1 of o Attempts Correct 20 Question 0% O of oo Attempts 21 Question O of oo Attempts 0% 22 Question 0% O of oo Attempts O 23 Question 1 of o Attempts 100% Correct O 24 Question 100% 1 of oo Attempts Correct Question Source: MRG - General Chemistry| Publisher: University Science Books

E Give Up? = 21 of 28 Questions O Assignment Score: O Hint 84.7% Check Answer Resources U 13 queaLIUIT υυνο 1 of o Attempts Correct < Question 21 of 28 O 14 Question Calculate the heat energy released when 15.9 g of liquid 100% Constants for mercury at 1 atm 1 of o Attempts mercury at 25.00 °C is converted to solid mercury at its Correct heat capacity of Hg(1) 28.0 J/(mol-K) melting point. melting point 234.32 K O 15 Question 95% enthalpy of fusion 2.29 kJ/mol 2 of oo Attempts Correct O 16 Question 100% 1 of oo Attempts Correct kJ qp = O 17 Question 100% 1 of o Attempts Correct 18 Question O of oo Attempts 0% O 19 Question 100% 1 of o Attempts Correct 20 Question 0% O of oo Attempts 21 Question O of oo Attempts 0% 22 Question 0% O of oo Attempts O 23 Question 1 of o Attempts 100% Correct O 24 Question 100% 1 of oo Attempts Correct Question Source: MRG - General Chemistry| Publisher: University Science Books

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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Use the following information on Na to determine the total amount of heat required to convert 150.0 g of solid Na at 48.0°C into gaseous Na at 883°C. Report your answer to 3 SF and in units of kJ. Melting Point = 98.0°C Boiling Point = 883°C Molar Heat Capacities:Csolid = 23.7 J/mol °CCliquid=37.5 J/mol °CΔH fusion= 2.64 kJ/molΔH vaporization= 97.9 kJ/mol
Chemistry If 21. cal of heat is added to 14.5 g each of sodium chloride and ethanol at 13. "C, what is the final temperature of each substance? Be sure each of your answer entries has the correct number of significant figures. Note: Reference the Phase change properties of pure substances and Conversion factors for non-SI units tables for additional information Part 1 of 2 Final temperature of sodium chloride- Part 2 of 2 Check -0% Final temperature of ethanol- CL.P X 5 5 MacBook Air Save For Later db Submit Assignment
s | PerodicC Table Equations The heat energy associated with a change in temperature that does not involve a change in phase is given by q = mC,AT where q is heat in joules, m is mass in grams, C, is specific heat in joules per gram per degree Celsius, Jg1°C-1 and AT is the temperature change in degrees Celsius. The heat energy associated with a change in phase at constant temperature is given by q= mApeH° where q is heat in joules, m is mass in grams, and ApcH° is the enthalpy of phase change in joules per gram. Physical constants The constants for H,O are shown here: • Specific heat of ice: Cs, ice = 2.09Jg1°C1 • Specific heat of liquid water: Cs, water = 4.18 Jg1°c-1 Enthalpy of fusion: Afus H° = 334 Jg • Enthalpy of vaporization: AvapH° =2250 J g1 • Part A How much heat energy, in kilojoules, is required to convert 39.0 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) 32.80 kJ…
Calculate the number of kilojoules of energy required to convert 30.0 grams of liquid ethanol initially at a temperature of -114.0°C to gas at 150.0°C. kj substance Ethanol Water DMSO t-Butanol formula C₂H5OH H₂O C₂H6SO C4H10O m.w. g/mol m.p. °℃ -114.0 0.0 46.069 18.015 78.129 19.0 74.123 25.2 b.p °℃ 78.0 100.0 189.0 82.4 AH fus kJ/mol 5.02 6.01 14.4 6.78 AHvap kJ/mol 38.6 40.67 48.6 39.1 Specific Heat Capacity Liquid J/g °C 2.30 4.184 1.96 2.9 Solid J/g °C 0.970 2.09 1.80 1.97 Gas J/g °C 1.94 1.84 1.20 1.73
Item 11 A 1.60 mole sample of Ar undergoes an isothermal reversible expansion from an initial volume of 2.00 L to a final volume of 85.0 L at 307 K. Part A Calculate the work done in this process using the ideal gas equation of state. Express your answer using three significant figures. w = -1.53x104 J Submit Previous Answers v Correct Part B Calculate the work done in this process using the van der Waals equation of state. Express your answer using three significant figures. w = -1.52x104 J Submit Previous Answers Correct Part C What percentage of the work done by the van der Waals gas arises from the attractive potential? Express your answer using two significant figures. Vα ΑΣΦ ? 0.99 % Submit Previous Answers Request Answer X Incorrect; Try Again; 3 attempts remaining
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Acetylene (CH2) is commonly used as a fuel for welding. a) Write a balanced chemical equation that describes the combustion of acetylene. b) Calculate AHrn for the combustion of 1 mole of acetylene. c) A steel MC cylinder can contain 310 grams of acetylene. Calculate the heat released by the combustion of the acetylene in 1 steel MC cylinder. d) How much water can you warm from 20 °C to 90 °C using 310 grams of acetylene. e) How much ice can you melt at 0 °C using 310 grams of acetylene.
Rowan ChemSu22. A gas sample of a compound weighing 34.3 g (MW: 70.2 g/mol) at 127.2 C is converted to the liquid phase at 44.6 C. What amount of heat (in J) is required to perform this process? Tb = 114 C Hvap 2.44 kJ/mol specific heat of the gas is 4.3 g/J*mol specific heat of the liquid is 1.4 g/J*mol
A 23.0 gram sample of an alloy was heated to 100.00 °C and dropped into a beaker containing 92 grams of water at 25.84 °C. The temperature of the water rose to a final temperature of 27.84 °C. Neglecting heat losses to the room and the heat capacity of the beaker itself, what is the specific heat of the alloy in /g°C? а. 2.16 ОБ. 0.464 O c. 0.232 O d. 4.32