Determine the entropy change when 8.50 mol HBr(1) freezes at atmospheric pressure.

Q: The normal boiling point of Br2(l) is 58.8 ∘C, and it'smolar enthalpy of vapor Calculate the value…

A: The molar enthalpy of vaporization is 29.6 kJ/mol Temperature = 58.8 + 273 = 331.8 K

Q: The heat of vaporization AH, of methanol (CH;OH) is 35.3 kJ/mol. Calculate th

A: If   vapourisation of methanol       CH3OH(l)     ⇔  CH3OH(g)    △Hv = 35.3 KJ/mol     then…

Q: For the following reaction (the detonation of nitroglycerin), is it spontaneous under standard…

A: Given that : We have to identify whether the reaction for the detonation of nitroglycerin is…

Q: Consider the data in the table. Compound Melting point (°C) AHfus (kJ/mol) Boiling point (°C) AHvap…

A: Given: The melting and the boiling point of HBr is -86.96°C and -67.0°C, respectively. The enthalpy…

Q: he sum of the entropy changes of the system and the surroundings (∆SSYS + ∆SSURR) are:

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Q: According to the second law of thermodynamics, what must be true about entropy changes when dry ice…

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Q: Does someone know the standard entropy values in J/K for H2(g), F2(g) and HF(g)?

A: The standard entropy values of hydrogen and fluorine gases are 130.6 J/Kmol and 202.8 J/Kmol…

Q: What is the entropy when 1.39 moles of CCl₂F₂ vaporize at 25°C? [∆H(vap) = 17.2 kJ/mol at 25°C]

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Q: Predict the sign of delta H and delta S for the reaction X(s) = X(g) and state under what conditions…

A: As solid  X is transformed into gaseous species. thus in this reaction entropy increases as the…

Q: Given the reaction:  CaCO3(s)  ??  CaO(s)  +  CO2(g), the entropy (ΔS) change for this reaction is…

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Q: The addition of 121  g potassium fluoride to 591  mL of water (d = 1.00 g/mL) causes the temperature…

A: The mass of solution is calculated as shown,

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

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Q: The standard molar entropy of silver chloride (AgCl) is 96.2 J/(mol x K). What is the entropy of…

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Q: 46. Which of the following involves a decrease in entropy? A) the sublimation of solid CO2 into CO2…

A: The correct answer about entropy is given below

Q: Suppose a compound could point in any of three directions in the solid and still have the same…

A: • This problem is based upon the third law of thermodynamics.  • This law can be given as, Total…

Q: 10. Entropy can be calculated by a relationship proposed by Ludwig Boltzmann:52S = InWwhere k = 1.38…

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Q: 3. True or false: the standard entropy of H₂(g) at 298.15 K is zero. (a) True (b) False

A: Standard entropy of a substance is the entropy of 1mole of the substance at standard conditions (…

Q: The boiling point of ethanol is 173.1 F. In an experiment the entropy change for the reaction…

A:

Q: It is determined that a particular chemical reaction has AH°rxn = 105 kJ and As°rxn = 252 JK1.…

A: For spontaneous reaction delta G must be negative....

Q: In a typical cold pack (used for sports injuries), a salt such as ammonium nitrate is kept in a…

A: Dissolution of ammonium nitrate in water is given by, NH4NO3(s)→H2O(l) NH4+(aq)+NO3-(aq)   ∆H=+25.09…

Q: What is the entropy when 1.35 moles of CCl₂F₂ vaporize at 25°C? [∆H(vap) = 17.2 kJ/mol at 25°C]

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Q: Which substance has the higher entropy?(a) dry ice (solid CO2) at −78 °C or CO2(g) at 0 °C(b) liquid…

A: The substance which has higher entropy has to be predicted.

Q: What is the entropy when 1.34 moles of CCl₂F₂ vaporize at 25°C? [∆H(vap) = 17.2 kJ/mol at 25°C]

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Q: What is the entropy change of the universe when 5.74 mol of ice melts at temperature is 25.8oC?…

A: Answer: Entropy is the measure of system's disorderliness or randomness. In more possible states…

Q: Arrange H202, H2S and H20 in order of decreasing molar entropy

A: WE HAVE TO ARREANGE IN DECREASING ORDER OF MOLAR ENTROPY.

Q: What is the entropy change of a gas in J/K (to 2 decimal points) when one mole of a perfect gas…

A: Given that -  Number of moles of gas = 1  Initial volume of gas = 0.36 m3  Final volume of gas =…

Q: 5. Which of the following substances has the greatest standard molar entropy at 25 °C? a) Na (s) b)…

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Q: 5. The entropy change of the process H2O (s) H2O () is 22 J/K at 0 °C. Calculate the enthalpy of…

A: H2O(s)↔H2O(l)∆H=22J/KT=0∘C=0+273K=273K∆S=∆HT

Q: What are the signs of ΔH, Δ S, and ΔG for a spontaneous endothermic process?

A: Answer:Here, T must always be in Kelvin

Q: What is the entropy of the process when 0.6831 moles of N 2 gas are compressed from 54.42 L to 28.11…

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Q: For the reaction 2 CO (g) + O2 (g) → 2 CO2 (g), the entropy change is expected to be negative. Is…

A: The given chemical reaction is as follows: 2CO (g) + O2 (g) → 2CO2 (g) The stoichiometry of the…

Q: Acetone, CH; COCH3 , boils at 56°C. The heat of vaporization of acetone at this temperature is 29.1…

A: Given: Boiling point temperature= 56 C=329.15 K Heat of vaporization= 29.1 kJ/mol