There are three sets of sketches below, showing the same pure molecular compound (water, molecular formula H2O) at three different temperatures. Thesketches are drawn as if a sample of water were under a microscope so powerful that individual atoms could be seen. Only one sketch in each set is correct.Use the slider to choose the correct sketch in each set. You may need the following information:melting point of H₂O: 0.0 °Cboiling point of H₂O: 100.0 °CBC(Choose one) (Choose one) (Choose one)1 2 3 43 45123451I|35. °C269. °C-22.°C

In the image, you're being asked to choose the correct molecular structure for water at three…

Answered: There are three sets of sketches below,…

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter15: Solutions

Section: Chapter Questions

Problem 17CR: Are changes in state physical or chemical changes? Explain. What type of forces must be overcome to...

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There are three sets of sketches below, showing the same pure molecular compound (ammonia, molecular formula NH₂) at three different temperatures. The sketches are drawn as if a sample of ammonia were under a microscope so powerful that individual atoms could be seen. Only one sketch in each set is correct. Use the slider to choose the correct sketch in each set. You may need the following information: melting point of NH3: -77.7 °C boiling point of NH₁: -33.3 °C B (Choose one) (Choose one) (Choose one) -59, °C -89, °C 54, °C
MN4.
How much energy is needed to change the temperature of 39 g of water from 10.0 °C to 95.0 °C? Enthalpy values for H2O: Cp (g) = 1.89 J/g•°C Cp () = 4.18 J/g•°C Cp (s) = 2.11 J/g•°C ΔΗ AH us = 6.01 kJ/mol ΔΗ. vap = 40.7 kJ/mol
There are three sets of sketches below, showing the same pure molecular compound (hydrogen chloride, molecular formula HCI) at three different temperatures. The sketches are drawn as if a sample of hydrogen chloride were under a microscope so powerful that individual atoms could be seen. Only one sketch in each set is correct. Use the slider to choose the correct sketch in each set. You may need the following information: melting point of HCl: – 114.8 °C boiling point of HCl: -85.1 °C 00 A C (Choose one) (Choose one) (Choose one) ol. | 2 3 4 5 - 10. °C – 132. °C -89. °C JAN 14 MacBook Air 80 88 DI DD F11 F1 F2 F4 F5 F6 F7 F8 F9 F10 F3
A: 4.91 g of LiCl was dissolved in 50.0 mL of water in the same calorimeter as in problem 1. Analysis of the thermogram showed the initial temperature to be 22.9°C, the final temperature to be 49.2°C. Was the dissolution of the ionic solid exothermic or endothermic? B: Using the information above, calculate the mass of the water. C: Calculate ΔHsolution D : Calculate the standard molar enthalpy of solution. Assume that the pressure is 1 bar.
Consider the melting points of the substances below (see figures for two compounds). Explain the trend in melting point using your knowledge of intermolecular forces. (In the structures below, carbon is black, hydrogen is white, and oxygen is red.) Substance Melting Point (°C) Molar Mass (g/mol) Cl2 −102 71 Ethyl formate (CH3CH2OCHO) −80 74 Propionic acid (CH3CH2COOH) −20 74 Br2 −7.2 160
3. Which one of the following compounds would you expect to have the highest heat of solution? CaSO4·2 H2O, CaSO4, or CaSO4·10 H2O?
Chemistry written by hand please.
When 96.64 grams of fictional compound X is added to water to make 331.6 grams of solution, the temperature increases from 22.09 °C to 84.56 °C. What is the heat of solution for compound X given that the molar mass of compound X is 135.74 g/mol? Assume the specific heat capacity of the solution is 4.18 J/g°C. -32.05 kJ/mol -121.6 kJ/mol 121.6 kJ/mol -86.60 kJ/mol 86.60 kJ/mol
When 54.29 grams of fictional compound X is added to water to make 341.3 grams of solution, the temperature increases from 20.29 °C to 83.39 °C. What is the heat of solution for compound X given that the molar mass of compound X is 154.77 g/mol? Assume the specific heat capacity of the solution is 4.18 J/g°C. a -256.6 kJ/mol b 15.50 kJ/mol c 256.6 kJ/mol d -90.02 kJ/mol e 90.02 kJ/mol
4. What is the minimum amount of ice at 0°C that must be added to the contents of a can of diet cola (340mL) to cool it down from 20.5°C to 0°C? Assume that the specific heat and density of the diet cola are the same as for water and that no heat is gained or lost to the surroundings. The latent heat of fusion of ice is 335J/g. Specific Heat of water 4.184 J/g.K, and Density of water is 1 g/mL.
11. It has been determined that the body can generate 5500 kJ of energy during one hour of strenuous exercise. Perspiration is the body’s mechanism for eliminating this heat. How much water (in grams and in liters) would have to be evaporated through perspiration to rid the body of the heat generated during two hours of strenuous exercise? (The heat of vaporization of water is 40.6 kJ/mol.)

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