Without doing a calculation, predict whether the entropy change will be positive or negative when each reaction occurs in the direction it is written. a. CaCO3 (s) → CaO(s) + CO2(g) O positive Onegative b. CH3 OH(2) + 3/2 0, (9) → CO2(9) +2 H20(g) O positive negative c. C,H4 (9) + H2 (9) → C2H6 (9) Opositive Onegative d. HCl(g) + NH3 (g) → NH, C1(s) Opositive Onegative

Q: ow as it ripens D. A&B C. Throwing 50 coins results in all tails 8. According to the third law of…

A: Third law of thermodynamics states that  Entropy of a pure substance at perfectly crystalline state…

Q: a) For the vaporization of a liquid at its boiling point, A(l) → A(g), is the entropy change of the…

A: The entropy tells the randomness present in the system due to its disorderness created in the system…

Q: Methanol is relatively inexpensive to produce. Much consideration has been given to using it as a…

A: ∆SCH3OH = 126.8 kJ/mol ∆SCH4 = 186.264 kJ/mol ∆So2 = 205 kJ/mol

Q: Entropy changes cannot be measured with a calorimeter likê enth If the result upon calculation of…

A: 7. Entropy can be measured by using the formula, ∆S=qT Heat change can be measured calorimeter.…

Q: Calculate the change of the entropy of the reaction for the formation of ammonia from nitrogen and…

A: Nitrogen reacts with hydrogen to form ammonia. The equation for the balanced chemical reaction is…

Q: Consider the combustion of propane gas:C3H8(g) + 5 O2(g)---------->3 CO2(g) + 4 H2O(g) ΔHrxn =…

A: The reaction of combustion of propane

Q: A 3.0 g block of ice melts at 0.0°C [ΔHfus(H2O) = 6.01 kJ/mol]. Calculate the entropy change for…

A: Heat require during melting of a liquid: Q1 = n . ΔHfus Heat require during warming up of a liquid:…

Q: 4. Entropy can be represented mathematically by magnitude a. AS = -1 b. AS # 0 c. AS = +1

A: Gibbs Free energy (∆G) =∆H - T∆S where ∆H = Enthalpy change             T = Temperature           ∆S…

Q: Steam is condensed at 100°C and the water is cooled to 0 °C and frozen to ice. What is the molar…

A:

Q: A flask containing helium gas is released into a closed room.  Which of the following ideas…

A: For the reaction to spontaneous entropy change must be positive .

Q: For each of the following, predict whether the entropy of the system change will be positive or…

A:

Q: Calculate the change in entropy that occurs in the system when 54.0 g of acetone (C3H6O) vaporizes…

A:

Q: Which process should show the greatest increase in entropy? Select one: a. N,(g) + 0,(g) 2 NO(g) Ob.…

A: Entropy of a system depends upon the mass of the system. Mass of the system is directly proportional…

Q: Octane is typical of the components of gasoline. Estimate  (a) the entropy of vaporization of…

A: Latent heat of vaporization is physical property defines as the heat required to change the 1 mole…

Q: In the previous reaction of carbon with water, why does the standard entropy you calculated have the…

A: The balanced given reaction is as follows,

Q: entropy change

A:

Q: Examine each of the reactions in the multiple choices below and decide whether the entropy change…

A: If gaseous mole of product increases then reaction have positive entropy change if gaseous mole of…

Q: Without doing a calculation, predict whether the entropy change will be positive or negative when…

A:

Q: For each of the following reactions, indicate whether you would expect the entropy of the system to…

A: As the number of gaseous moles increases on the product side the entropy is said to be increasing…

Q: Chloroform, CHCl3, is a solvent and has been used as an anesthetic. The heat of vaporization of…

A: We have:   Thus, the amount of energy required to boil 1.44 moles of CHCl3 is:

Q: A reaction has ΔH∘rxn= -139 kJ and ΔS∘rxn=303 J/K .     Part A At what temperature is the change in…

A: GIven: ΔH∘rxn= -139 kJ=-13900 J ΔS∘rxn=303 J/K . Now, ∆Ssurrounding = ∆Hreaction / T

Q: Consider two processes: sublimation of I2(s) and melting of I2(s) (Note: the latter process can…

A: The entropy of the system is the measure of total randomness and the degree of randomness is higher…

Q: With two dice, each numbered 1–6, there are two possible ways to roll a 3. and Thus, for the outcome…

A: The possible ways to roll a 4 is given below

Q: te the change in entropy that occurs in the system when 3.20 mol of diethyl ether (C4H100) melts at…

A: Melting point (T) = - 116.3 0C                                = - 116.3 + 273.15…

Q: AS 163.3 J/K 9. What value of Gibbs free energy can we safely predict that the reaction is…

A:

Q: (a) In a chemical reaction 3 moles of A(g) and 2 moles of B(g) react to form 4 moles of C(g) and 1…

A: DS is referred as change in entropy.

Q: What is the entropy change when 1.55 moles of CHCl₃ vaporizes at 61.0 °C? [∆H(vap) = 29.6 kJ/mol at…

A:

Q: Predict the sign of the entropy change of the system for each of the following reactions. Explain…

A:

Q: The following reactions take place at 25 °C and 1 atm. Calculate the entropy change for urrounding.…

A: The change in entropy of the surroundings is a measure of how much energy is being taken in or given…

Q: An iron nail is placed in a sealed glass jar filled with humid air (the "system").  After the nail…

A: Change in entropy (ΔS) is defined as the ratio of heat transfer (Q) and temperature (T). The…

Q: For each process predict the sign of the entropy change taking place. A. Solid sugar is added to…

A:

Q: Calculate the change in entropy that occurs in the system when 23.0 g of isopropyl alcohol condenses…

A:

Q: Chloroform, CHCl3, is a solvent and has been used as an anesthetic. The heat of vaporization of…

A: The entropy change (in J/K) is to be calculated.

Q: You make tea with 0.250 (kg) of 80.0 ("C] water and let it to cool to 20.0 ['C) before drinking it.…

A:

Q: (b) 2 Na(s) + 2 H20(1) → 2 NaOH(aq) + H2(g) As° J/K rxn As° × 10 J/K (enter your answer in…

A: Given data :- 2Na(s)    +     2H2O(l)     →   2NaOH(aq)    +    H2(g) ∆S for Na = 51.05 J/mol.K ∆S…

Q: When fumes of ammonia and fumes of hydrobromic acid meet, they form a “smoke” of solid ammonium…

A: The question is based on the concept of chemical thermodynamics. we have to calculate enthalpy,…

Q: State whether the sign of the entropy change expected for each of the following processes will be…

A: Thermodynamics is the study of flow heat in the system. The entropy is a thermodynamic quantity that…

Q: methanol is burned as fuel in some race cars. This makes it clear that the reaction is spontaneous…

A: From the second law of thermodynamics Entropy of the universe always increases. Or, the change in…

Q: Predict the sign of the entropy change, ΔS, for the following processes. Explain the reason for each…

A: Few questions based on chemical thermodynamics, which is to be accomplished.

Q: Methanol is burned as fuel in some race cars. This makes it clear that the reaction is spontaneous…

A: The second law of thermodynamic explains that the heat transfer occur in the system from higher to…

Q: The energy produced by a spontaneous reaction is often used to provide the energy to drive…

A: The amino acid combination can be depicted as:

Q: For each of the following reactions, indicate whether you would expect the entropy of the system to…

A: Entropy is the randomness in the system. Gases have more entropy than liquids. Similarly, liquids…

Q: In which of the following processes does the entropy of the system decrease? (i) CH4(g) + 2 O2(g)…

A: Entropy is the measurement of disorder.  Gases have more entropy than liquids and liquids have more…

Q: What is the entropy change, in J mol-1 K-1, when 100.0 g of water boils at 100.0 oC?…

A: The relation between deltaH vaporization and change in entropy is:

Q: Indicate whether each process produces an increase or decrease in the entropy in the system. Please…

A: We have to predict whether we have increase or decrease in the entropy of the system.

Q: Methanol is burned as fuel in some race cars. This makes it clear that the reaction is spontaneous…

A:

Q: Consider the decomposition of dinitrogen tetroxide, N2O4, into nitrogen dioxide, NO2.  N2O4…

A: The balanced reaction given is, => N2O4 (g) → 2 NO2 (g) The thermodynamic data given is,…

Q: Given the following reaction and its enthalpy change, and the sign of the entropy change that you…

A: A reaction is said to be spontaneous if the change in the Gibbs free energy of the reaction comes…

Q: When a reaction is exothermic and the products have more entropy than the reactants, the reaction…

A: Spontaneous reactions  are the reactions that occur by itself without help of any external sources…

Q: A simple chemical system has an entropy value of 8.07E-23 J/mol K. How many microstates does this…

A: By the relationship between entropy and microstate , we have ;  S = KB ln Ω ----------------(I)…