Which of the following would be expected to have positive entropy change?   Cooling of nitrogen gas from 80 oC to 20 oC Freezing of ethanol Dissolving of glucose in water Condensation of water vapor Condensation of I2 vapor into I2 solid

Q: How many milliliters of solution of 0.150 M LE-COs could a student make from 8.33 grams of Li.CO,…

A: Given =  concentration = 0.150 M  Wt . In gm = 8.33 g  Molecular wt = 73.89 =74 g/mol 73.88 g of…

Q: Calculate the ΔHºrxn of the following processes at 25 degrees celsius and determine whether each…

A: ΔHºrxn is given by the difference of ΔHºproducts  and ΔHºreactants.If ΔHºrxn is negative, then it is…

Q: Hot packs used by skiers use the crystallization of sodium acetate from a concentrated solution.…

A: Enthalpy change is defined as the amount of heat released or absorbed in a chemical reaction. It is…

Q: Use Hess's law to calculate ΔG°rxn using the following information.               NO(g) + O(g) →…

A: The first thing to do is to change the bottom three reactions to make it look like the top reaction.…

Q: For the following example, identify the following. This reaction gets hot when it occurs.    2…

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Q: A student wants a chemical reaction that will produce the most amount of heat to use for heating…

A: The reactions that produce heat are called exothermic reactions. We will use this to answer the…

Q: Change During an endothermic chemical reaction, a gas is consumed and a liquid produced. A solid…

A: Answer:The spontaneity of the reaction can be decided on the basis of the value of Gibbs free energy…

Q: Which of the following processes are exothermic? 1) Dew evaporates in the morning 2)Gasoline burns…

A: Exothermic reaction are the reaction in which heat is released and endothermic reactions are those…

Q: Read the descriptions of physical or chemical changes in the table below. Then decide whether the…

A: Answer:A chemical reaction can only be spontaneous when  is less than zero and value of  is:Here: T…

Q: Using the following reactions: 2 H 2 (g) + O 2 (g) --> 2 H 2O (g) ∆H = –484 kJ x 2…

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Q: A 2.50 g block of iron is heated to 355.5 °C then plunged into 50.0 g of water at 25.0 °C. What will…

A: qw = -qm mw × cw × (Tf - Ti) = - { mm × cm ×( Tf-Ti) } 50 × 4.184 × (Tf - 25 ) = - { 2.50 × 0.444 ×…

Q: Which one of the following reactions cannot proceed spontaneously as written at any temperature?…

A: For a reaction having ∆H positive and ∆S negative can not be spontaneous.

Q: For the reaction 2CH4 (g) + 3 Cl2 (g) → 2 CHCl3 (l) + 3 H2 (g), ΔH° = -118.6 kJ. ΔH°f = -134.1…

A: a balance chemical equation,   2CH4(g) + 3Cl2(g) -----> 2CHCl3(l) + 3H2(g) ∆Ho = -118.6 kJ  &…

Q: What is the entropy change (in J/K) associated with the formation of 15.0 g of SO2 for the reaction…

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Q: Some conditions that influence entropy are: Larger atoms have higher entropy because they have more…

A: Entropy, a concept in thermodynamics, reflects the degree of disorder or randomness within a system.…

Q: Surrounding Reaction A Reaction B Temperature Initial Temp 25.1°C 25.1°C Final Temp 30.2°C 20.0°C…

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Q: Change An exothermic chemical reaction between a solid and a liquid results in gaseous products. A…

A: Answer: Spontaneity of the reaction can be decided on the basis of the value of Gibbs free energy…

Q: Based on the thermodynamic properties provided for water, determine the energy change when the…

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Q: Read the descriptions of physical or chemical changes in the table below. Then decide whether the…

A: A reaction is said to be spontaneous if a change in Gibbs free energy is negative.…

Q: The sun catalyzes the atmospheric reaction as seen below. 2N2O(g)+O2(g)→4NO(g) This reaction would…

A: Answer :-  The reaction will have a Positive ΔS , because the moles of gas increases.…

Q: Identify the change in state that does NOT have an increase in entropy.   a water evaporating   b…

A: Entropy - Measure the randomness or disorderness of molecule  Solid to liquid, liquid to gases…

Q: Solid carbon graphite reacts with oxygen gas to release of 393.7 kJ per mole of carbon dioxide gas…

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Q: Consider the following generic reaction: A+2B→C+3D with ΔH = 111 kJ . Determine the value of ΔH for…

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Q: How many of the following processes are accompanied by a positive entropy change? heating a pot of…

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Q: Consider the reaction CH4 (g) + 4 Cl2 (g)  CCl4 (l) + 4 HCl (g), ∆H = –398 kJ. For each of the…

A: The theory of Le Chatelier's is an intuition regarding chemical equilibria of reactions. It states…

Q: 1. A piece of hot metal (400 K) is place inside a beaker of cold water (285 K). Which of the…

A: Given that The temperature of the metal piece = 400 K The temperature of the cold water in beaker…

Q: Use Hess’s law to calculate the amount of heat released when 10 g of ethanol C2H5OH is combusted…

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Q: Identify the change in phyical state that is a decrease in entropy.   water boiling   ice melting…

A: Entropy is the measurement of randomness of any substance, if randomness decreases entropy…

Q: 4. Identify the molecule that will release more total energy during combustion – ethane (C,Hs) or…

A: Combustion: A chemical process in which a substance reacts with oxygen and releases heat energy.

Q: What is the change in entropy (positive, negative, or zero) for the system? Sugar crystals are…

A: When solid dissolved in water, the entropy increases; but considering sugar that is larger when…

Q: How would I tell how and why this reaction changes in temperature and pressure? 4CO(g) + H2O(g) CH4…

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Q: Read the descriptions of physical or chemical changes in the table below. Then decide whether the…

A: Given physical or chemical change:A gas expands, absorbing heat from the surroundingsDuring an…