b) Calculate the amount of heat involved in the conversion of 25.00 g of water at 100° to steam at 100°. (AHvaporization = 40.7 kJ/mol)

Q: Two students measure the vapor pressure of the same unknown organic liquid and compare results. The…

A: The Clausius-Clapeyron equation is given as:

Q: How much heat is released if 5.4g of steam at 105°C is condensed into 90°C liquid water?

A: Total heat released Q = Q1 + Q2 Where Q1 = heat released when steam at 105 °C is brought to steam at…

Q: Arrange the liquids represented by the following molecular models in the expected order of…

A: Boiling point:The temperature at which the vapor pressure of the liquid becomes equal to the…

Q: 2. Pentane C5H12 boils at 36°C at 1 atmosphere pressure. What is the molar heat of vaporization…

A: given, P1 = 1 atm , T1 = ( 273 + 36)K = 309K P2 = 505 torr = (505 x 0.00132) atm = 0.67 atm , T2…

Q: 5. A 1.111 mole of ice at -15°C is mixed with 100 g of water at 90 C. Calculate the final…

A: The given information is: Moles of ice = 1.111 mol Temperature of ice = -15°C = (273-15) = 258 K…

Q: Suppose 1g of water at 10 °C was heated and there are no heat lost in the surroundings. How much…

A: Given that:                       Mass of water = 1g = 0.001 Kg                    Initial…

Q: How much heat would be required to convert 390 g of solid benzene, C6H6 (s), at 5.5°C into benzene…

A: Given : Mass of benzene = 390 g Initial temperature of benzene = 5.5 oC And final temperature of…

Q: How many grams of ethanol, C,H,OH, can be boiled with 473.1 kJ of heat energy? The molar heat of…

A: Given: Heat energy available, E=473.2kJ Molar heat of vaporization of ethanol, Cv = 38.6kJ/mol   To…

Q: What amount of heat, in kJ, is required to convert 2.70 g of water at 67.0 °C to 2.70 g of steam at…

A: Given:  Mass of water = 2.70 g  Initial temperature of water = 67.0°C  Final temperature of water =…

Q: What amount of heat, in kJ, is required to convert 2.50 g of water at 67.0 °C to 2.50 g of steam at…

A: Q1 = m×c×(T2-T1)  Q2 = (m/w)(∆Hvap) Amount of heat = Q1 + Q2

Q: How many J of energy must be removed when 126.0 g of steam, at a temperature of 163.0°C, is cooled…

A:

Q: How much heat energy is required to convert 84.0 g (1.82 mol) of liquid ethanol (C2H5OH) at 78.4 °C…

A: Heat energy can be calculated by following formula:  q = m×s×(T2 - T1) Where m is the mass of the…

Q: Chloroform, CHCl3, was once used as an anesthetic. Its vapor pressure is 197 mm Hg at 23 degrees…

A: Heat of vaporization of CHCl3 can be calculated using the given data by applying Clausius- Clapeyron…

Q: How much heat is required to convert 422 g of liquid H2O at 23.5 °C into steam at 150 °C?

A:

Q: For water, specific heat values for the solid and liquid phase are 2.00 J/gC and 4.18 J/gC…

A: Introduction: Phase diagram is shows the relationship of physical states of a substance under…

Q: What amount of heat, in kJ, is required to convert 3.70 g of water at 67.0 °C to 3.70 g of steam at…

A: Given: mass of water = m = 3.70 g specific heat of water = S = 4.184  J/g°C ∆T =  100 - 67 = 33°C…

Q: How much heat (in kJ) is required to convert 428 g of liquid H2O at 22.7°C into steam at 154°C?…

A:

Q: To what temperature would you have to heat Zn(1) to cause its vapor pressure to become 284.7 mm Hg…

A: Given :-  Heat of vaporization = ∆Hvap =  131.00 kJ/mol = 131000 J/mol   Normal boiling point of Zn…

Q: The enthalpy of vaporization of Substance X is 30.0 mol and its normal boiling point is -27. °C.…

A: Given: Enthalpy of vaporization of X = 30.0 kJ/mol Normal boiling point of X      = -27 oC To find…

Q: The ethalpy of vaporization of liquid mercury is 59.11 kj/mol. What quantity of energy as heat is…

A: Enthalpy of vaporization is the amount of heat added to the liquid to transform into the vapor.

Q: Calculate the amount of heat energy (in kJ) required to convert 25.7 g of water at 65.6ºC to steam…

A:

Q: (59,63) A compound with a molecular mass of 168 g/mol has an enthalpy of vaporization of 56.8…

A: Given: Vapour pressure at 35 oC = 455 torr. And ΔHvap = 56.8 KJ/mol = 56800 J/mol.

Q: How many grams of ethanol, C2H5OH,C2⁢H5OH, can be boiled with 369.4 kJ369.4 kJ of heat energy? The…

A: Given: Heat energy = 369.4 kJ Molar heat of vaporization of ethanol = 38.6 kJ/mol Known: Molar mass…

Q: What amount of heat (in kJ) is required to convert 15.2 g of an unknown liquid (MM = 67.44 g/mol) at…

A: We know that, q=mass×specific heat+temp. change

Q: Conversion of 0.852  g of liquid water to steam at 100.0°C requires 1.89  kJ of heat. Calculate the…

A: To calculate the molar enthalpy of vaporization, it is required to calculate the number of moles of…

Q: How much energy (in kJ) is released when 15.3 g of steam at 125 °C is condensed to give liquid water…

A:

Q: Toluene, C6H5CH3, is a liquid used in the manufacture of TNT. Its normal boiling point (at 760 torr)…

A: Concept introduction: Clausius-Clapeyron equation is used to find the vapor pressure at one…

Q: From the data below, calculate the total heat (in J) needed to convert 30.00 g of ice at −4.00…

A: The heat required to change the temperature of 30 g ice from -4.00 to 0.00 oC (q1) is determined as…

Q: 7. Calculate the amount of energy needed to convert 200. g of water at 25.0°C to steam at 150.0°C.…

A: We have 200 g of water at 25 degree Celsius, final we have steam at 150 degree Celsius. We have to…

Q: H8. The enthalpy of vaporization of benzene, C6H6(l) is 33.9 kJ/mol at 298 K. How many liters of…

A: Given

Q: What amount of heat, in kJ, is required to convert 4.70 g of water at 67.0 °C to 4.70 g of steam at…

A: When heat is applied to an object, the temperature rises. Its temperature will drop if heat is taken…

Q: Explain why the enthalpies of vaporization of the following substances increase in the order CH4…

A: Enthalpy of vaporization depends on the strength of inter molecular forces. High inter molecular…

Q: What amount of heat, in kJ,.is required to convert 2.80 g of water at 67.0 °C to 2.80 g of steam at…

A:

Q: What amount of heat, in kJ, is required to convert 1.90 g of water at 67.0 °C to 1.90 g of steam at…

A: The amount of heat required for the conversation of 1.90 g of water at 67.0 °C to 1.90 g of steam at…

Q: A 6.30 g sample of solid Na3PO4⋅7H2O was heated such that the water turned to steam and was driven…

A: Given, the pressure of steam =1.00 atmamount of solid Na3PO4.7H2O =6.30 grammolar mass of…

Q: What amount of heat, in kJ, is required to convert 4.20 g of water at 67.0 °C to 4.20 g of steam at…

A: Formula for amount of heat Q = m×C×ΔT + n×ΔHvap  Where m = mass of water = 4.20 g C is heat…

Q: What is the molar heat of vaporation (ΔHvap) in kJ/mol of a liquid that has a vapor pressure of 641…

A:

Q: 2. Assume the total heat of vaporization (per gram) of water can be usec to supply the energy needed…

A: Literature value for the enthalpy of vaporization of water = 2260 J/g

Q: What amount of heat, in kJ, is required to convert 1.60 g of water at 67.0 °C to 1.60 g of steam at…

A: Given: Mass of water = 1.60 g. Initial temperature of water = 67.0 oC And the final temperature of…

Q: What amount of heat is required to convert 3.30 g of water at 67.0 °C to 3.30 g of steam at 100.0…

A: The formula of heat is given by:

Q: The amount of heat in kJ required to convert 0.7 gal of liquid water to steam equal……………………….. (ΔH…

A: Heat required to convert liquid water to steam would be calculated using ∆Hvaporization .

Q: What is the heat of vaporization(kj/mol) if it takes 3452 J of heat to completely vaporize 2.68…

A: Consider the given information is as follows; Heat of vaporization = 3452 J = 34521000 kJ=3.452 kJ…

Q: Calculate the heat released when 65.5 g of steam at 116.0°C is converted to water at 57.0°C. Assume…

A:

Q: How much energy is required to vaporize 178 g of butane (C 4H 10) at its boiling point, if its ΔH…

A: · m=Mass of Butane C4H10 = 178 g· ∆Hvap=Enthalpy of vaporization = 24.3 kJmol We need to calculate…

Q: How much energy is needed to turn 10.0 g of water at 25°C to steam ( = 6.01 kJ/mol;  = 40.76 kJ/mol;…

A:

Q: Steam at 100oC was passed into a flask containing 276.87g of water at 21oC, where steam condensed.…

A:

Q: Suppose that 0.95 g of water condenses on a 75.0 g block of iron that is initially at 22°C. If the…

A: Given, mass of water =0.95 g         Mass of iron block=75 g       Enthalpy of vaporization of water…

Q: How much heat must be applied to convert a 1.00 g piece of ice at −10°C to steam at 120°C?

A: Given: 1g of ice at -10°C to steam at 120°C  To find: Heat required for the above process.…

Q: What amount of heat, in kJ, is required to convert 1.40 g of water at 67.0 °C to 1.40 g of steam at…

A: We have given that mass of water = 1.40g  H2O(l)    →  H2O(g)                            ∆Hvap =…

Thermochemistry

Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.    

Exergonic Reaction

The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.