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AH(T) = AH (Trep) + ACR AT where Tret, is some reference temperature, usually 298.15 K....
t 1 atm, one cup (225 grams) of water is heated from 298.15 K to the...
t 1 atm, one cup (225 grams) of water is heated from 298.15 K to the boilingtemperature (373.15 K), turns completely into steam, and finally reaches a temperature of 423.15 K.a. (6 Points) Compute the enthalpy change (∆H) for the entire processb. (6 Points) Compute the entropy change (∆S) for the entire processNote that i) the molecular weight of water is 18.015; ii) the heat capacity of liquid water has a roughlyconstant value of 75.3 J K−1mol−1; iii) the heat...
At 1 atm, one cup (225 grams) of water is heated from 298.15 K to the...
At 1 atm, one cup (225 grams) of water is heated from 298.15 K to the boiling temperature (373.15 K), turns completely into steam, and finally reaches a temperature of 423.15 K. a) Compute the enthalpy change (∆H) for the entire process b) Compute the entropy change (∆S) for the entire process Note that i) the molecular weight of water is 18.015; ii) the heat capacity of liquid water has a roughly constant value of 75.3 J K−1 mol−1 ;...
The vaporization of compound A is described by the following chemical equation. A(1) A(8) A rap(72.39...
The vaporization of compound A is described by the following chemical equation. A(1) A(8) A rap(72.39 °C) = 38.21 kJ/mol Calculate the entropy of vaporization, Aswap, for A(l) at 25.0 °C given that the boiling point of A is 72.39 °C, and the molar heat capacity of A(l) is 119.09 J/mol K). Assume that the molar heat capacity of A(R) is 56.5% of that of A(1). ASP J. mol-K Calculate the standard enthalpy of vaporization. A Hap, for A(1) at...
4. The heat of vaporization (AH) of water at 100C is 40.6 k]/mol and when 1mol...
4. The heat of vaporization (AH) of water at 100C is 40.6 k]/mol and when 1mol of water is vaporized at 100C and 1 atm pressure the volume increase is 30.19dm3. Calculate the work done by the system, the change in internal energy Δυ, the change in Gibbs energy ΔG and the entropy change AS.
Part A Several reactions and their standard reaction enthalpies at 298.15 K are given here: AH...
Part A Several reactions and their standard reaction enthalpies at 298.15 K are given here: AH (kJ · mol-?) CaC2 (s) + 2H2O(1) + Ca(OH)2 (s) + C2H2 (g) –127.9 Ca(s) + O2(g) → Cao(s) CaO(s) +H2O(1) + Ca(OH)2(s) -65.2 -635.1 The standard enthalpies of combustion of graphite and C2H2(g) are –393.51 and — 1299.58 kJ · mol-? respectively. Calculate the standard enthalpy of formation of CaC2(s) at 25°C. Express your answer to one decimal place and include the appropriate...
Chemical energy is released or absorbed from reactions in various forms. The most easily measurable form...
Chemical energy is released or absorbed from reactions in various forms. The most easily measurable form of energy comes in the form of heat, or enthalpy. The enthalpy of a reaction can be calculated from the heats of formation of the substances involved in the reaction: ΔH∘rxn=ΔH∘f(products)−ΔH∘f(reactants) Entropy change, ΔS∘, is a measure of the number of energetically equivalent microstates introduced into the system during the reaction. The degree of spontaneity of a reaction is represented by the Gibbs free...
Chemical energy is released or absorbed from reactions in various forms. The most easily measurable form of energy comes...
Chemical energy is released or absorbed from reactions in various forms. The most easily measurable form of energy comes in the form of heat, or enthalpy. The enthalpy of a reaction can be calculated from the heats of formation of the substances involved in the reaction: ΔH∘rxn=ΔH∘f(products)−ΔH∘f(reactants) Entropy change, ΔS∘, is a measure of the number of energetically equivalent microstates introduced into the system during the reaction. The degree of spontaneity of a reaction is represented by the Gibbs free...
36.1 J/K mol. Calculate the boiling point of liquid Liquid nitrogen has a measured enthalpy of...
36.1 J/K mol. Calculate the boiling point of liquid Liquid nitrogen has a measured enthalpy of vaporization (AH vap -2.79 kJ/mol and entropy of vaporization (AS nitrogen, in °C using this information. (Use 273.15 K 0°C for the temperature conversion. Report your answer with three significant figures.) Tp C
The vapor pressure of Y is 4.590 atm at 330K and 9.180 atm at 380K. What...
The vapor pressure of Y is 4.590 atm at 330K and 9.180 atm at 380K. What are the standard free energies of vaporization at the two temperatures? Hint: vaporization reaction is Y(I) = Y(g). AG330º = kJ/mol AG380º = kJ/mol Assume that the standard entropy and enthalpy of vaporization of Y are independent of temperature and determine their values ASO = J/(mol-K) AH = kJ/mol What is the normal boiling point of Y in degrees Celcius? t = Ос What...
5. Above what temperature does the following reaction become nonspontaneous AS = -153.2 J/K Given: AH...
5. Above what temperature does the following reaction become nonspontaneous AS = -153.2 J/K Given: AH = -1036 k); 2 H2(g) + 3 O2(g) → 2 502(g) + 2 H20(g) AG - AH' - TAS 46 = -1036000 -(T)(-153.2) = 0 6. What is the minimum temperature required for the spontaneous conversion of Cla(I) to CCL() Given: AH"vap) is 57.3 kJ/mol and ASva) is 164 J/(mol)? AG AH - TAS = 298 K 06 = 57300 - (298)(164) 46°= 8428...
The vaporization of compound A is described by the following chemical equation. A(1) A(8) A rap(72.39 °C) = 38.21 kJ/mol Calculate the entropy of vaporization, Aswap, for A(l) at 25.0 °C given that the boiling point of A is 72.39 °C, and the molar heat capacity of A(l) is 119.09 J/mol K). Assume that the molar heat capacity of A(R) is 56.5% of that of A(1). ASP J. mol-K Calculate the standard enthalpy of vaporization. A Hap, for A(1) at...
4. The heat of vaporization (AH) of water at 100C is 40.6 k]/mol and when 1mol of water is vaporized at 100C and 1 atm pressure the volume increase is 30.19dm3. Calculate the work done by the system, the change in internal energy Δυ, the change in Gibbs energy ΔG and the entropy change AS.
Part A Several reactions and their standard reaction enthalpies at 298.15 K are given here: AH (kJ · mol-?) CaC2 (s) + 2H2O(1) + Ca(OH)2 (s) + C2H2 (g) –127.9 Ca(s) + O2(g) → Cao(s) CaO(s) +H2O(1) + Ca(OH)2(s) -65.2 -635.1 The standard enthalpies of combustion of graphite and C2H2(g) are –393.51 and — 1299.58 kJ · mol-? respectively. Calculate the standard enthalpy of formation of CaC2(s) at 25°C. Express your answer to one decimal place and include the appropriate...
36.1 J/K mol. Calculate the boiling point of liquid Liquid nitrogen has a measured enthalpy of vaporization (AH vap -2.79 kJ/mol and entropy of vaporization (AS nitrogen, in °C using this information. (Use 273.15 K 0°C for the temperature conversion. Report your answer with three significant figures.) Tp C
The vapor pressure of Y is 4.590 atm at 330K and 9.180 atm at 380K. What are the standard free energies of vaporization at the two temperatures? Hint: vaporization reaction is Y(I) = Y(g). AG330º = kJ/mol AG380º = kJ/mol Assume that the standard entropy and enthalpy of vaporization of Y are independent of temperature and determine their values ASO = J/(mol-K) AH = kJ/mol What is the normal boiling point of Y in degrees Celcius? t = Ос What...
5. Above what temperature does the following reaction become nonspontaneous AS = -153.2 J/K Given: AH = -1036 k); 2 H2(g) + 3 O2(g) → 2 502(g) + 2 H20(g) AG - AH' - TAS 46 = -1036000 -(T)(-153.2) = 0 6. What is the minimum temperature required for the spontaneous conversion of Cla(I) to CCL() Given: AH"vap) is 57.3 kJ/mol and ASva) is 164 J/(mol)? AG AH - TAS = 298 K 06 = 57300 - (298)(164) 46°= 8428...
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