The heat of vaporization of water is 40.66 kJ/mol. How much heat is absorbed when 2.12 g of water boils at atmospheric pressure?

Q: What is the heat of vaporization for a liquid and why is it useful?

A: The vaporization is the transition process where liquid converted to vapor phase. The heat of…

Q: The main reason that distillation is a costly method for purifying water is the high energy required…

A: Distillation is the process in which the components of a mixture are separated on basis of different…

Q: The heat of vaporization of water is 40.66 kJ/mol. How much heat is absorbed when 2.02 g of water…

A: Given,  Heat of Vaporization of water, ∆Hvap = 40.66 kJ/mol  Mass of water, m = 2.02 g

Q: For many years drinking water has been cooled in hot climates by evaporating it from the surfaces of…

A: The heat released (q) in the evaporation of the given amount of water can be calculated by…

Q: Explain the concepts of specific heat, heat of fusion, and heat of vaporization.

A: The phase change graph explains these terms. The graph of heat supplied versus temperature exhibits…

Q: How much heat in kJ is required to convert 916 g of ice at-11.0°C to liquid water at 99.0°C? 706

A:

Q: How much energy is released when 75.3 g of water vapor at 115 degrees C condense and cool to liquid…

A: We know ,energy released HH = m×S× ( tf − ti ) Where H = heat m = mass in gramsS=Specific Heat…

Q: How much energy is needed to boil 45.0g of water at its boiling point? Water's heat of vaporization…

A: Given: Mass of water = 45.0 g. And heat of vaporization of water = 40.65 KJ/mol.

Q: How much heat energy in Joules is needed to convert 50.0g of ice at -5°c to liquid water at 100°c so…

A:

Q: How many joules of heat are absorbed then ice is heated from -15.6 °C to -1°C, the specific heat of…

A: Given Mass = 15.1 g Specific heat = 2.10 J/g-°C Temperature change = -15.6°C to -1°C

Q: Suppose that 1.15 g of rubbing alcohol (C3H8O) evaporates from a 65.0-g aluminum block. If the…

A: The given data contains, mass of block = 65.0 g. Temperature ( initial ) = 25°C

Q: The molar heat of vaporization of water at 25 °C is +43.9 kJ/mol. How many kilojoules of heat would…

A: Given, The molar heat of vaporization of water at 25°C is +43.9 kJmol

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: What mass of steam initially at 130 °C is needed to warm 200. g of water in a 100. g glass container…

A:

Q: The heat of vaporization of a liquid is 1344 J/g. What is the minimum number of joules needed to…

A: Given Mass = 40 g Heat of vaporization = 1344 J

Q: Why is the heat of vaporization of water greater at room temperature than it is at its boiling…

A: The heat of vaporization or heat of evaporation is the quantity of heat required by the compound or…

Q: How much heat energy was lost by the liquid ethanol? How much heat energy was gained by the solid…

A:

Q: Calculate the number of joules of heat that is required to completely boil 500 mL of water at 100 C.…

A: The amount of neat energy required by liquid Substance to changed into Gaseous substance. It is…

Q: The heat of fusion of water is 79.9 Cal/G. How much heat would be required to melt 75.9 G of ice?

A: Given: Mass of ice, m =75.9  g The heat of fusion of water =79.9 Cal/g

Q: Steam at 100.°C was passed into a flask containing 550.0 g of water at 32°C where the steam…

A: In the given problem, heat gained in the system is equal to the heat lost by the lost. Heat can be…

Q: Boiling is the temperature at which the vapor pressure of the liquid exceeds the atmospheric…

A: At high altitude, atmospheric pressure is low and hence water boils at lower temperature.

Q: How much heat is necessary to vaporize 685 g of h2o at 100 degrees c?

A: The amount of heat required to convert a liquid into vapour state is known as enthalpy of…

Q: When 4.61 grams of ice at – 20°C have absorbed 2500 calories of heat, what is the temperature of the…

A: Latent heat is the amount of energy that is required by a phase to convert itself from solid to…

Q: What’s the latent heat of fusion of water? The latent heat of vaporization? Why do we use the term…

A:

Q: How much heat is emitted when 4.05 g of water condenses at 25 °C? The heat of vaporization of water…

A: The heat of vaporization: It is the amount of heat that is required by a liquid substance when it…

Q: 20 g of water is heated at an increase of 2°C per minute. If the amount of water heated for 10…

A: given data -   mass = m = 20-8 = 12 g. c = specific heat capacity = 4.18 J/g. oC temperature = T =…

Q: How much heat would be required to convert 15.1 g of ice to water at 0°C? (∆Hfus = 6.01 kJ/mol for…

A: molar mass of water = 18 g/mol Given information: ∆Hfus = 6.01 kJmol

Q: A 100.0-mL sample of water is heated to its boiling point. How much heat (in kJ) is required to…

A: Density of water = 1.00 g/mL Volume of water = 100 mL Heat of vaporization of water = 40.7 kJ/mol…

Q: How much heat is needed to convert 35.6g of ice at 0°C to water at 27°C? AHfus of ice = 6.01 kJ/mol…

A: Heat required = Raise the temperature from 0 oC to 27 oC  Q = mc delta T

Q: The heat of vaporization of water is 540 cal/g. How much heat is needed to change 1.75 g of water to…

A: All things are provided in handwritten solution.

Q: How much heat is required to melt 63.0 g of ice? AH = 6.01 kJ/mol. fus kJ

A:

Q: How much heat is required to convert 20.0g of ice at -50.0 degrees C to liquid water at 0.0 degrees…

A: Heat in kilojoules can be calculated using the specific heat capacity, temperature difference and…

Q: Caculate the mass of water that can be vaporized at its boiling point with 200kj of heat

A: The moles of water that can be vapourised is determined first by using the given heat value and the…

Q: 11. Based on the heating graph shown in the figure for a substance, X, at constant pressure, Energy…

A: 11.a) Heat transfer     = mass × temperature change × specific heat  Or,  Q = m × T × S  Or,   T =…

Q: How much heat is needed to convert 36.5g of ice at 0°C to water at 66°C? ΔHfus of ice = 6.01 kJ/mol…

A: given, mass of Ice = 36.5 g Initial temperature (Ti) = 0°C Final temperature (Tf) = 66°C Note: molar…

Q: The heat of vaporization for ethanol is 0.826 kJ/g. Calculate the heat energy in joules required to…

A:

Q: huch heat is required to convert 125 g of bromine, Br2, from a solid to a liquid at its g point of…

A: The heat energy amount which is mainly needed for the state conversion such as solid-state to liquid…

Q: Calculate the heat required to vaporize 102 g of water at a temperature of 100oC   if the Heat of…

A: The heat of Vaporization: When we heat the liquid it gains energy and change to the vapor phase.…

Q: How much heat energy is required to boil 23.0 g of ammonia, NH,? The molar heat of vaporization of…

A: Given data: The mass of ammonia m= 23.0 g. The molar heat of vaporization of ammonia = 23.4 kJ/mol.…

Q: What is the heat of vaporization in kJ/mol?

A: P1 = 0.217atm P2 = 0.851atm T1 =-54.3°C or  218.85 K T2 = 1.79°C or  274.94 K

Q: Calculate the amount of heat required to completely evaporate 625 mL of water at 25°C. The enthalpy…

A:

Q: Calculate the heat, in kilocalories, that is absorbed if 139 g of ice at 0.0 ∘C is placed in an ice…

A: Given : Mass of ice i.e water = 139 g Initial temperature of ice = 0.0 oC Final temperature of water…

Q: The heat of vaporization of water is 40.66 kJ/mol. How much heat is absorbed when 3.17 g3.17 g of…

A: Given that the heat of vaporization of water is 40.66 KJ/mol. The mass of water is 3.17 g. Here, the…

Q: The heat of vaporization of water is 40.66 kJ/mol. How much heat is absorbed when 1.59 g of water…

A: To find how much heat is absorbed (q), • Convert mass of water to moles. • Multiply moles with heat…

Q: The heat of vaporization for ethanol is 0.826 kJ/g. Calculate the heat energy in joules required to…

A: Given, Heat of Vaporization for Ethanol=0.826 kJ/g Mass of Ethanol=73.75 g The question is about…

Q: Which phase change involves the absorption of heat?

A: A phase change is occured when a matter changes from one state to another state. The possible states…

Q: Calculate the mass of water that can be vaporized with 211 kJ of heat at the boiling point.

A: Heat of water (q) = 211 KJ Mass of water (m) = ? • Heat is related with enthalpy of vaporization as…

Q: How much heat is required to vaporize 30 g of water at 100˚C?

A:

Q: What's the heat change in Joules for vaporization of 9.00g of water at 100 degrees celcius

A: Heat of vaporization of water is 2256 J/g.Thus, when 1 mol of water is vaporised, 2256J/g heat is…

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.