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: A 90.7-g sample of ice, initially at -20.0°C, is completely converted into steam at 100.0°C.…

A:

Q: The molar heat capacity of ice is 37 J/mol*K and the molar heat capacity of liquid water is 76…

A:

Q: Methanol, CH3OH, has a boiling point of 337.85 K and a melting point of 175.55 K. Its heat of fusion…

A: Given : Mass of methanol = 16.02 g Initial phase of methanol = solid Initial temperature of methanol…

Q: A substance with molar mass = 115.5 g/mol), has a boiling point of 103°C. Calculate how much energy…

A: A multiple choice question based on heat energy exchange, which is to be accomplished.

Q: Two 20.0 g ice cubes at –10.0 °C are placed into 205 g of water at 25.0 °C. Assuming no energy is…

A: Suppose, final temperature of water is Tf °C Given that, heat capacity or H2O (s) of ice = 37.7 J…

Q: How much heat (KJ) is needed to transform 100 g of liquid water at 0°C into vapor at 110 °C. The…

A: Given: Water is to be transformed from 0°C to vapour at 110°C.

Q: What amount of heat (in kJ) is required to convert 15.8 g of an unknown solid (MM= 83.21 g/mol) at…

A: In the process of conversion, following steps will happen 1) Heating of solid from -5°C to 10.3 °C…

Q: What amount of heat (in kJ) is required to convert 10.1 g of an unknown liquid (MM = 67.44 g/mol) at…

A:

Q: Determine the total amount of energy required to heat 17.5 g of ethanol at -90.0 °C to ethanol vapor…

A: The mass of one mole of ethanol is 46 g/mol. This implies that 17.5 g of ethanol constitutes 0.38…

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: Two 20.0 g ice cubes at –14.0 °C are placed into 275 g of water at 25.0 °C. Assuming no energy is…

A: Given,Molar Heat Capacity of H2O(s) = 37.0 J/mol.K Molar Heat 2 Capacity of H O(l)= 75.3 J/mol.K…

Q: How much energy is needed to convert 64.2 grams of ice at 0.00°C to liquid water at 75.0°C? specific…

A: 64 g ice, first  ice at 0℃ fused to Water at 0℃.  Heat energy(q1)= m × ∆Hf Here, m= mass of ice=64g…

Q: An ice cube tray contains enough water at 22.0oC to make 18 ice cubes that each have a mass of 30.0…

A: Mass of 1 ice cube = 30.0 g Calculation of mass of 18 ice cubes: Mass=18×30=540 g Heat change when…

Q: Ethanol , C2H5OH, melts at -114oC and boils at 78oC. The enthalpy of fusion for ethanol is 5.02…

A: The given mass of liquid ethanol is converted into moles first.

Q: Two 20.0 g ice cubes at –11.0 °C are placed into 295 g of water at 25.0 °C. Assuming no energy is…

A:

Q: How much heat (KJ) is needed to transform 100 g of liquid water at 0°C into vapor at 110 °C. The…

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: 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: Acetone, (CH3)2CO, is a colorless and highly flammable liquid commonly used as a solvent in the…

A:

Q: The heat of fusion of cobalt at its normal melting point of 1495°C is 15.5 kJ/mol, while its heat of…

A: #(a): Given the heat of fusion of Co at its melting point, ∆Hfusion = 15.5 kJ/mol heat of…

Q: How much energy will be released when 108 g of water condenses? The process occurs at 100° The heat…

A: The energy needed for transforming any liquid matter into its vapor state at specific temperature is…

Q: Two 20.0 g ice cubes at -16.0 °C are placed into 215 g of water at 25.0 °C. Assuming no energy is…

A: mass of ice, m1=20g                                                                     mass of…

Q: The Enthalpy of Vaporization of 1-chlorobutane, C4H9Cl, is 30.4 kJ/mol at a boiling point of 78.6…

A:

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: How long would it take for 1.50 mol of water at 100.0 ∘C to be converted completely into steam if…

A: By calculating total heat required to convert into steam , we can calculate time.

Q: Using the provided data, calculate the amount of heat, in kJ, that must be removed to cool 19.2 g of…

A:

Q: The molar heat of vaporization of acetone, C3H,O, is 30.3 kJ/mol at its boiling point. How many…

A:

Q: How much energy is released when 15.3g of steam at 125.0 degress celsius is condensed to give liquid…

A: Determine heat released when temperature is reduced from 125oC to 100oC steam:

Q: How much heat is required to convert 25.0 g of solid acetic acid (HC2H3O2) at 0.0 °C to liquid at…

A: Q = m×c× (t2-t1) q = heat absorbed m= the mass of the sample c = the specific heat of the substance…

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: The amount of heat required to convert one mole of a substance from liquid to gas is known as the…

A:

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: Which of the following statements concerning phase changes is FALSE? a. Enthalpy of vaporization is…

A: The critical temperature of a substance can be defined as the highest temperature at which the…

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

A:

Q: From the data below, calculate the total heat (in J) needed toconvert 0.333 mol of gaseous ethanol…

A: We will use the formula,  Where Q= Heat change m= mass in grams = Change in Temperature c= specific…

Q: a)The table below gives two values of Delta H° for phase changes in molecular iodine. One value is…

A: Solid →                 Liquid    is     ∆H fusion            Liquid →                 Gas   is…

Q: The density of liquid oxygen at its boiling point is 1.14 kg/Lkg/L , and its heat of vaporization is…

A:

Q: How much heat energy is required to convert 84.0 g (1.82 mol) of liquid ethanol (C2H5OH) at 50.0 °C…

A: Given: Specific heat capacity of ethanol = 2.45 J/g⋅ oC Mass of ethanol = 84.0 g moles of ethanol =…

Q: What amount of heat (in kJ) is required to convert 10.1 g of an unknown liquid (MM = 67.44 g/mol) at…

A: please find the answer attached .

Q: Liquid ammonia (boiling point = –33.4°C) can be used as a refrigerant and heat transfer fluid. How…

A: Liquid ammonia (boiling point = –33.4°C) can be used as a refrigerant and heat transfer fluid. The…

Q: What quantity of heat is required to convert 49 g of ethanol (C₂H₅OH) at 23.0°C to a vapor at 78.3°C…

A: Given : Initial temperature of ethanol = 23.0 oC  Final temperature of ethanol = boiling point…

Q: Calculate the amount of heat (in kJ) released when converting 150.2 g of water to ice at -23 degrees…

A: Hello. Since more than one question has been posted, the first question shall be only answered in…

Q: The molar heat of vaporization of acetone, C3H,O, is 30.3 kJ mol 1 at its boiling point. How many…

A: This type of problem can be solved by converting the amount of given species with respect to the…

Q: Ethanol (C₂H5OH) meits at-114 °C and boils at 78°C. The enthalpy of fusion of ethanol is 5.02…

A:

Q: Chloromethane, CH3 Cl, arises from microbial fermentation and is found throughout the environment.…

A:

Q: From 25.0°C to 94.5°C, 75.1 grams of ethanol are heated. What was the energy requirement in joules?…

A: The mass of ethanol = 75.1 g T1: Initial Temperature (25.0oC) T2: Final Temperature (78.4oC)[Boiling…

Q: 3. Water has a molar heat capacity of 75.38 J/(mol * °C) and its enthalpy of vaporization is 40.7…

A: During the conversion of water from 20.0oC to 100oC, two processes occur. Firstly, the liquid is…

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.