Principles of General, Organic, Biological Chemistry
2nd Edition
ISBN: 9780073511191
Author: Janice Gorzynski Smith Dr.
Publisher: McGraw-Hill Education
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Chapter 4.7, Problem 4.28P
Interpretation Introduction
Interpretation:
The amount of energy released when
Concept introduction:
The specific heat is the amount of heat energy needed to raise the temperature of
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How much energy (in calories) is required to melt 25.0 g of ice to water at 0.0 °C, heat the liquid water to 100. °C, and vaporize the water to steam at 100. °C? The specifi c heat of water is 1.00 cal/(g · °C), the heat of fusion of water is 79.7 cal/g, and the heat of vaporization of water is 540 cal/g.
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.
Calculate the heat released when 65.5g of water at 55.5 ° C cools to ice at 0.0 ° C. (Given that the specific heat of liquid water is 1.00 calg×°C, and heat of water solidification is 80.0 cal/g.).
Chapter 4 Solutions
Principles of General, Organic, Biological Chemistry
Ch. 4.1 - Prob. 4.1PCh. 4.1 - Prob. 4.2PCh. 4.1 - Prob. 4.3PCh. 4.1 - Prob. 4.4PCh. 4.2 - Prob. 4.5PCh. 4.2 - Prob. 4.6PCh. 4.3 - Prob. 4.7PCh. 4.3 - Prob. 4.8PCh. 4.3 - Prob. 4.9PCh. 4.3 - Prob. 4.10P
Ch. 4.3 - Which of the compounds in each pair has stronger...Ch. 4.4 - Prob. 4.12PCh. 4.4 - Prob. 4.13PCh. 4.5 - A student has two containers one with 10 g of...Ch. 4.5 - Prob. 4.15PCh. 4.5 - How much energy is required to heat 28.0 g of iron...Ch. 4.5 - Prob. 4.17PCh. 4.5 - Prob. 4.18PCh. 4.5 - Prob. 4.19PCh. 4.6 - Prob. 4.20PCh. 4.6 - Prob. 4.21PCh. 4.6 - Label each process as endothermic or exothermic...Ch. 4.6 - Prob. 4.23PCh. 4.7 - Answer the following questions about the graph. a....Ch. 4.7 - Prob. 4.25PCh. 4.7 - If the cooling curve in Figure 4.5 represented a...Ch. 4.7 - How much energy (in calories) is released when...Ch. 4.7 - Prob. 4.28PCh. 4 - What phase change is shown in the accompanying...Ch. 4 - What phase change is shown in the accompanying...Ch. 4 - Consider the cooling curve drawn below. a. Which...Ch. 4 - Which line segments on the cooling curve in...Ch. 4 - Prob. 4.33UKCCh. 4 - Prob. 4.34UKCCh. 4 - Prob. 4.35UKCCh. 4 - Prob. 4.36UKCCh. 4 - Prob. 4.37UKCCh. 4 - Prob. 4.38UKCCh. 4 - Prob. 4.39APCh. 4 - Prob. 4.40APCh. 4 - Prob. 4.41APCh. 4 - Prob. 4.49APCh. 4 - Prob. 4.50APCh. 4 - Prob. 4.54APCh. 4 - Prob. 4.55APCh. 4 - Prob. 4.56APCh. 4 - Prob. 4.57APCh. 4 - Prob. 4.58APCh. 4 - Prob. 4.59APCh. 4 - Prob. 4.60APCh. 4 - Prob. 4.61APCh. 4 - Prob. 4.62APCh. 4 - Prob. 4.63APCh. 4 - Prob. 4.64APCh. 4 - Prob. 4.65APCh. 4 - Prob. 4.66APCh. 4 - Prob. 4.67APCh. 4 - Prob. 4.68APCh. 4 - Prob. 4.69APCh. 4 - Prob. 4.70APCh. 4 - Prob. 4.71APCh. 4 - Prob. 4.72APCh. 4 - Prob. 4.73APCh. 4 - Prob. 4.74APCh. 4 - Prob. 4.75APCh. 4 - Prob. 4.76APCh. 4 - Prob. 4.77APCh. 4 - Prob. 4.78APCh. 4 - Prob. 4.79APCh. 4 - Why does steam form when hot lava falls into the...Ch. 4 - Prob. 4.81APCh. 4 - Prob. 4.82AP
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- Are changes in state physical or chemical changes? Explain. What type of forces must be overcome to melt or vaporize a substance (are these forces intramolecular or intermolecular)? Define the molar heat of fusion and molar heat of vaporization. Why is the molar heat of vaporization of water so much larger than its molar heat of fusion? Why does the boiling point of a liquid vary with altitude?arrow_forwardA quantity of ice at 0C is added to 64.3 g of water in a glass at 55C. After the ice melted, the temperature of the water in the glass was 15C. How much ice was added? The heat of fusion of water is 6.01 kJ/mol and the specific heat is 4.18 J/(g C).arrow_forwardThe enthalpy of vaporization of water is larger than its enthalpy of fusion. Explain why.arrow_forward
- If 14.5 kJ of heat were added to 485 g of liquid water, how much would its temperature increase?arrow_forwardThe enthalpy change when 1 mol methane (CH4) is burned is 890 kJ. It takes 44.0 kJ to vaporize 1 mol water. What mass of methane must be burned to provide the heat needed to vaporize 1.00 g water?arrow_forwardWill a closed container of water at 70 C or an open container of water at the same temperature cool faster on a cold winter day? Explain why.arrow_forward
- On a hot day, you take a six-pack ot a on a pcmc, cooling it with ice. Each empty (aluminum) can weighs 12.5 g. A can contains 12.0 oz of soda. The specific heat of aluminum is 0.902 J/g C; take that of soda to be 4.10 J/g C. (a) How much heat must be absorbed from the six-pack to lower the temperature from 25.00 to 5.00C? (b) How much ice must be melted to absorb this amount of heat? (Hfus of ice is given in Table 8.2.)arrow_forwardThe cooling effect of alcohol on the skin is due to its evaporation. Calculate the heat of vaporization of ethanol (ethyl alcohol), C2H5OH. C2H5OH(l)C2H5OH(g);H=? The standard enthalpy of formation of C2H5OH(l) is 277.7 kJ/mol and that of C2H5OH(g) is 235.1 kJ/mol.arrow_forwardBenzene, C6H6, is an organic liquid that freezes at 5.5 C (Figure 11.1) to form beautiful, feather-like crystals. How much energy is evolved as heat when 15.5 g of benzene freezes at 5.5 C? (The enthalpy of fusion of benzene is 9.95 kJ/mol.) If the 15.5-g sample is remelted, again at 5.5 C, what quantity of energy is required to convert it to a liquid?arrow_forward
- Define the joule in terms of SI base units.arrow_forwardThe amount of heat required to melt 2 lbs of ice is twice the amount of heat required to melt 1 lb of ice. Is this observation a macroscopic or microscopic description of chemical behavior? Explain your answer.arrow_forward9.46 The heat of fusion of pure silicon is 43.4 kJ/mol. How much energy would be needed to melt a 5.24-g sample of silicon at its melting point of 1693 K?arrow_forward
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