Methanol(CH3OH) has a melting point of -96.7°C and a boiling point of 64.7°C. Its heat of fusion and vaporization are ΔHfus= 3.18 kJ/mol and ΔHvap=37.6kJ/mol, respectively, and the heat capacities of its three phases are Cs(solid) = 3.28J/g°C, Cs(liquid) = 2.53 J/g°C, and Cs(gas) = 3.62J/g°C.   a. Sketch the heating curve for methanol. You should properly indicate the steepness of the heating portions, and the relative amount of heat required for the melting and boiling portions of the curve.   b. Calculate the heat released when 25.0 grams of methanol vapor at 100 °C is converted to liquid methanol at 50°C.    c. Liquid water has ΔHvap=40.7 kJ/mol. Which liquid requires more heat to completely convert to vapor?

Q: p.101edu.co Question 27 of 30 What amount of heat (in kJ) is required to convert 27.5 g of an…

A: Given Mass of unknown solid = 27.5 g T1 = -5°C T2 = 52.3°C

Q: Calculate the heat required to completely convert 8.25 g of solid benzene (heat of fusion 9.92…

A:

Q: What amount of heat (in kJ), is required to convert 29.3 g of an unknown solid (MM = 83.21 g/mol) at…

A:

Q: Liquid butane is used in cigarette lighters. The boiling point of butane at 1 atm pressure is -1.0…

A:

Q: Using 2 mols of ice, a student performed an experiment to determine the molar enthalpy of fusion for…

A: Given : moles of ice = 2 mol Accepted value of ΔHfus = 6.01 KJ/mol And % error = 4.5 %

Q: Calculate the heat required to convert 18.6 g of propyl alcohol, C3H8O, from a solid at -150°C into…

A:

Q: The specific heat of ice is 2.10 kJ/kg °C, the heat of fusion for ice at 0°C is 333.7 kJ/kg, the…

A: Heat loss by steam should be equal to heat gain by ice.  Heat change in same phase=ms∆T Heat change…

Q: cry 8°F Clear X app.101edu.co Substance CsHs (9) O: (g) CO₂ (g) H₂O (g) b Answered: Ice cubes at 0°C…

A: A combustion reaction refers to a reaction in which a fuel reacts with an oxidizing agent to release…

Q: What amount of heat (in kJ) is required to convert 13.3 g of an unknown liquid (MM = 83.21 g/mol) at…

A:

Q: Calculate the enthalpy change (in kJ) associated with the conversion of 25.0 grams of ice at -4.00…

A: Given: ∆Hvap=40.67 kJ/mol∆Hfus=6.01 kJ/molmass of ice=25.0 gcice=2.09 J/g.Kcwater=4.18…

Q: The following information is given for ethanol, C₂H5OH, at 1atm: AHvap (78.4 °C) = 38.6 kJ/mol…

A: Given: Sample of liquid ethanol = 39.5 g Boiling point = 78.4°C

Q: Liquid butane is used in cigarette lighters. The boiling point of butane at 1 atm pressure is -1.0…

A: Given P1 = 1 atm P2 = ? T1 = -1°C = 273+(-1) = 272 K T2 = 25°C = 272+25 = 298 K R = 8.314 ×10⁻³…

Q: A 36.0 g sample of liquid water at 100.0oC is heated to 145.0 oC.   How much heat does the water…

A:

Q: How much energy is removed when 45 grams of ethanol condenses to liquid? Ethanol heat of…

A: Given : Mass of ethanol condensed = 45 g Molar mass of ethanol = 46 g/mol. And heat of vaporisation…

Q: into

A: T1 = -151.0 °C T2 = 98.0 °C Tm =-117.3 °C Tb = 78.3 °C

Q: H2O has a ΔHvap = 40.8 kJ/mol and a ΔHfus = 6.02 kJ/mol. The specific heat capacity of ice is 2.11…

A: The amount of heat absorbed to elevate the temperature of ice (Q1) at -42oC to 0oC is equal to…

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: What amount of heat (in kJ) is required to convert 19.3 g of an unknown liquid (MM = 67.44 g/mol) at…

A: Here , heat is used in three steps , 1)  in rising of temperature of liquid till boiling point. 2)…

Q: What amount of heat (in kJ) is required to convert 14.9 g of an unknown solid (MM = 83.21 g/mol) at…

A: Answer:It is a 3 step process:Heating of solid up to its melting pointMelting of solid into…

Q: What amount of heat (in kJ) is required to convert 19.1 g of an unknown solid (MM = 83.21 g/mol) at…

A: We have to calculate the amount of heat needed.

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: What amount of heat (in kJ) is required to convert 29.9 g of an unknown solid (MM = 67.44 g/mol) at…

A: The objective of the question is to calculate the total amount of heat required to convert a solid…

Q: A 21.3-g sample of ice at -14.6°C is mixed with 118.4 g of water at 80.0°C. Calculate the final…

A: Given: m1=mass of ice=21.3 gm2=mass of water=118.4 gT1=initial temperature=-14.6oCT2=final…

Q: A sample of C.H.Br, has a normal boiling temperature of 131.5 °C. The enthalpy of vaporization for…

A: GivenA sample of , has a normal boiling temperature of 131.5 °C. The enthalpy of vaporization for…

Q: The heat capacity, Cp, of liquid carbon disulfide is a relatively constant 78 J/(mol K). However,…

A: Solution In this question we use Third Law of Thermodynamics it tells us that as T → 0 K, S → 0.…

Q: What amount of heat (in kJ) is required to convert 16.6 g of an unknown solid (MM = 67.44 g/mol) at…

A: We have to find amount of heat (in kJ) is required to convert 16.6 g of an unknown solid (MM = 67.44…

Q: What amount of heat (in kJ) is required to convert 29.3 g of an unknown solid (MM = 67.44 g/mol) at…

A: When a certain amount of heat is added to a system, the temperature associated with that system is…

Q: Consider the following selected properties of water: Density (liquid water): d = 1.00 g/mL Heat of…

A:

Q: 3. Suppose that 1.15 g of rubbing alcohol (C3H8O) evaporates from a 65.0 g aluminum block. If the…

A: As per the answer guidelines I have to answer only one question until mention of doing all not given…

Q: What amount of heat (in kJ) is required to convert 26.6 g of an unknown solid (MM = 92.14 g/mol) at…

A: Given : Initial temperature of solid = -115oC Final temperature of solid = 32.3 oC Mass of solid =…

Q: 578,070 J of heat is required to raise the temperature of 15.0 moles of liquid methanol, CH3OH, from…

A:

Q: Liquid butane is used in cigarette lighters. The boiling point of butane at 1 atm pressure is -1.0…

A:

Q: What amount of heat (in kJ) is required to convert 10.7 g of an unknown liquid (MM = 83.21 g/mol) at…

A:

Q: 14. Calculate the amount of heat (in kJ) released when 35.0 g of benzene vapor is cooled from 96.0…

A:

Q: If a particular liquid has a normal boiling point of 338.0 K and a vapor pressure of 75.0 mmHg at…

A: Hi, as you have posted multiple questions and have not mentioned which question you want us to solve…

Q: What amount of heat (in kJ) is required to convert 20.0 g of an unknown solid (MM = 83.21 g/mol) at…

A: Given Molecular weight of solid = 83.21g/mol Mass = 20g specific heat capacity of solid = 2.39…

Q: A cube of solid benzene (C6H6; M = 78.11 g/mol) at its melting point and weighing 8.90 g is placed…

A: Given data is Molar mass of  benzene 78.11 g/mol Mass of benzene placed in water =8.90 g…

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.