Homework Answers
Answer Sheet:
Entropy is defined as the randomness or disorderness of the molecules. The entropy change positive if the randomness or disorder is increases and the sign of the entropy change is positive. If the randomness decreases then the change of entropy is negative and the sign of the entropy change is negative.
a) the boiling of water i.e H2O(l) -----> H2O(g)
When the water is boiling then the liquid water is transform to water vapour which is gas . Since disorderness of the gas is higher than the liquid . So the change in entropy is positive and the sign of the entropy change is positive.
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Please answer 12-17 and show work. I’m not sure which equations to use 15. The gas...
Please answer 12-17 and show work. I’m not sure which
equations to use
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Match the definition with the term ____ Transition from solid to liquid A. condensation ____ Transition...
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The entropy of a substance increases as we change it from solid to liquid to gas, as we increase the motion and configurations possible (and go from a highly ordered structure to one lacking any struc...
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175Q16 Because the number of moles of gas are increasing from 6 to 7 in the...
175Q16 Because the number of moles of gas are increasing from 6 to 7 in the reaction shown below, at constant pressure ΔE is predicted to be slightly ________ negative than ΔH. C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(g)
Thermodynamics Practice Problems 1. Predict the sign of AS.(positive or negative) for the following reactions a...
Thermodynamics Practice Problems 1. Predict the sign of AS.(positive or negative) for the following reactions a 2 Mg(s) +,(@) 2 Mgo (s) AS b. CH206(s) → 2C,H,OH(I) + 2003(g) AS c. 2 NH3(g) + CO2(g) → H2O(l) + NH CONH3(aq) AS d. Cu(s) (at 100°C) → Cu(s) (at 25°C) AS 2. Which two variables can indicate if a reaction is spontaneous or not? 3. The second law of thermodynamics tells us that: a Energy is conserved. b. The entropy of...
The heat of combustion of liquid C2H60 is -1460.4 kJ/mol at 298K. Thermodynamic tables Note, tolerance...
The heat of combustion of liquid C2H60 is -1460.4 kJ/mol at 298K. Thermodynamic tables Note, tolerance on this problem is set to 1% so maintain all decimal digits as given or found in Thermodynamic Table. What is the combustion reaction to which this number applies? Instructions: • Write balanced reaction in the order: fuel + oxygen -> carbon dioxide + water (H20) • Use -> (hyphen + greater than) for yields • Do not include the states, i.e., no (s),...
Learning Goal Internal Energy of an ideal gas The internal energy of a system is the...
Learning Goal Internal Energy of an ideal gas The internal energy of a system is the energy stored in the system. In an ideal gas, the internal energy includes the kinetic energies (translational and rotational) of all the molecules, and other energies due to the interactions among the molecules. The internal energy is proportional to the Absolute Temperature T and the number of moles n (or the number of molecules N). n monatomic ideal gases, the interactions among the molecules...
Homework week 6 1. How do gaseous, liquid, and solid methanol (CHO) compare in each of...
Homework week 6 1. How do gaseous, liquid, and solid methanol (CHO) compare in each of the following features: (a) density; (b) the space between the molecules; (c) the attractive force between the molecules? 2. Convert each pressure unit to the indicated unit. a. 3.0 atm to mm Hg b. 720 mm Hg to psi c. 424 mm Hg to atm 3. A sample of nitrogen gas has a volume of 15.0 mL at a pressure of 0.50 atm. What...
24) Which of the following represent STP (Standard Temperature and Pressure) conditions? A) T -0 K...
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34) Which of the followine represent STP Standard Temperature and Pressure) conditions A) TOK and Plam BT-0"C and P...
34) Which of the followine represent STP Standard Temperature and Pressure) conditions A) TOK and Plam BT-0"C and P760 atm CT-273 K and P-0 atm D) T-273 K and P lam ETIK and Patm 25) 23) Which of the following is TRUE for a liquid that is placed in a sealed container? A) Condensation of the evaporated molecules in the car can only occur once all of the liquid molecules are in the vapor for gaseous) state. B) A set...
Please answer 12-17 and show work. I’m not sure which
equations to use
15. The gas above the liquid in a sealed bottle of soda is primarily carbon dioxide. Carbon dioxide is also dissolved in the soda. When the distribution of carbon dioxide between the gas and liquid is hase , , at equilibrium, molecules ofcarbon dioxide in the gas phase can stilldissolve in the iquid they strike the surface and are captured. Similarly, molecules of carbon dioxide can escape...
Match the definition with the term ____ Transition from solid to liquid A. condensation ____ Transition from liquid to gas B. Boiling ____ Transition from solid to gas C. Freezing _____ Transition from gas to liquid D. Melting _____ Transition from liquid to solid E. Sublimation How many milligrams are in 8.22 moles of sodium hydroxide (molar mass = 39.997 g/mol). Be sure to show your work, correctly label your units and use the correct number of significant figures. A...
Thermodynamics Practice Problems 1. Predict the sign of AS.(positive or negative) for the following reactions a 2 Mg(s) +,(@) 2 Mgo (s) AS b. CH206(s) → 2C,H,OH(I) + 2003(g) AS c. 2 NH3(g) + CO2(g) → H2O(l) + NH CONH3(aq) AS d. Cu(s) (at 100°C) → Cu(s) (at 25°C) AS 2. Which two variables can indicate if a reaction is spontaneous or not? 3. The second law of thermodynamics tells us that: a Energy is conserved. b. The entropy of...
The heat of combustion of liquid C2H60 is -1460.4 kJ/mol at 298K. Thermodynamic tables Note, tolerance on this problem is set to 1% so maintain all decimal digits as given or found in Thermodynamic Table. What is the combustion reaction to which this number applies? Instructions: • Write balanced reaction in the order: fuel + oxygen -> carbon dioxide + water (H20) • Use -> (hyphen + greater than) for yields • Do not include the states, i.e., no (s),...
Learning Goal Internal Energy of an ideal gas The internal energy of a system is the energy stored in the system. In an ideal gas, the internal energy includes the kinetic energies (translational and rotational) of all the molecules, and other energies due to the interactions among the molecules. The internal energy is proportional to the Absolute Temperature T and the number of moles n (or the number of molecules N). n monatomic ideal gases, the interactions among the molecules...
Homework week 6 1. How do gaseous, liquid, and solid methanol (CHO) compare in each of the following features: (a) density; (b) the space between the molecules; (c) the attractive force between the molecules? 2. Convert each pressure unit to the indicated unit. a. 3.0 atm to mm Hg b. 720 mm Hg to psi c. 424 mm Hg to atm 3. A sample of nitrogen gas has a volume of 15.0 mL at a pressure of 0.50 atm. What...
24) Which of the following represent STP (Standard Temperature and Pressure) conditions? A) T -0 K and P = 1 atm B) T=0°C and P 760 atm C) T= 273 K and P = 0 atm D) T-273 K and P-1 atm E) T = 1 K and P = 1 atm 25) Which of the following is TRUE for a liquid that is placed in a sealed container? A) Condensation of the evaporated molecules in the jar can only...
34) Which of the followine represent STP Standard Temperature and Pressure) conditions A) TOK and Plam BT-0"C and P760 atm CT-273 K and P-0 atm D) T-273 K and P lam ETIK and Patm 25) 23) Which of the following is TRUE for a liquid that is placed in a sealed container? A) Condensation of the evaporated molecules in the car can only occur once all of the liquid molecules are in the vapor for gaseous) state. B) A set...
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