8. The following table shows the melting points (T, °C) of naphthalene at each weights (g) of naphthalene (128 g mol) and biphenyl (169 g mol). Calculate the heat of fusion of naphthalene (kJ mol). (0 °C 273 K: R = %3! 0.0821 L atm mol- K- 8,31 J mol- K) Naphthalene (g) Biphenyl (g) Melting point (T, °C) 5.00 0,00 80,2 5.00 0.73 75.2 5.00 1,65 69.7 5.00 2,83 63.7

Q: Octane (C8H18), an important component of gasoline, is a flammable compound with a boiling point of…

A: Octane is an aliphatic compound which is an important component of gasoline.

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

A:

Q: a. What mass of ethylene glycol (C2H6O2) must be added to 221.0g of water to obtain a solution with…

A:

Q: How much heat in KJ is needed to convert 150 grams of frozen acetone at -100oC  to vapor at 80oC.…

A: We will write changes and then calculate heat of each to get total heat.

Q: 6. A vapor volume of 1.17 L forms when a sample of liquid acetonitrile, CH3CN absorbs 1.00 kJ of…

A: Volume (V) = 1.17 L Boiling point= 81.6°C = 81.6 + 273 = 354.6 K Pressure (P) = 1.0 atm

Q: Ethylene glycol (HOCH2CH2OH), the major substance inantifreeze, has a normal boiling point of 198…

A: a) Since when H is present in the molecule attached with O, the molecules are forming H bonds with…

Q: What amount of heat (in kJ) is required to convert 16.1 g of an unknown liquid (MM = 83.21 g/mol) at…

A: Answer:- This question is answered by using the simple concept of calculation of heat required using…

Q: AH of vaporization of water is 413.2 cal/g at the normal boing point. Since virus can survive at…

A: Normal boiling point is defined as the temperature of a substance when the external pressure is…

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: A 389.3 gram sample of an unknown substance (MM = 92.41 g/mol) is heated from -23.1 °C to 51.8 °C.…

A: Heat absorbed by substance to convert it from solid to liquid.

Q: 1. The enthalpy of fusion for Hg is 2.29 kJ/mol. What is the energy change when 78.0g of Hg melt at…

A: Given: The enthalpy of fusion for Hg = 2.29 kJ/mol We have to calculate the energy change when 78.0g…

Q: An organic solvent with a molar mass of 56.45 g/mol have a normal boiling point of 45.0 °C and a…

A: According to the question we have, Mass of liquid is given by = 24.0 g Specific heat capacity of the…

Q: 1. What is the use of dry ice? Dry ice, CO2 (solid), does not melt at atmospheric pressure. It…

A:

Q: The following information is given for copper at latm: boiling point = 2567 °C AHvap lvap(2567 °C)%…

A: Given that : At 1 atm pressure, the information about copper is given below : Given mass of copper…

Q: How much heat is required to evaporate 100.0g of liquid ammonia, NH3, at its boiling point if it's…

A: When a liquid converts into a vapor state it absorbs heat. The amount of heat absorbed when one mole…

Q: Why does the antifreeze ingredient ethylene glycol (HOCH₂CH₂OH;Μ=62.07g/mol ) have a boiling point…

A:

Q: 11.4 If 42.0 k of heat is added to a 32.0-g sample of liquid meth- ane under 1 atm of pressure at a…

A: GivenThe total heat transferred = 42.0kJPressure= 1 atmMass= 32.0gT= -170 °Cc1= 3.48 J/gKc2=…

Q: - For the following molecules: methyl ethyl ether, CH3OCH2CH3; carbon disulfide, CS2; and benzene,…

A: Intermolecular forces present in- methyl ethyl ether = London dispersion, dipole-dipole forces CS2…

Q: 1. Use the data for methanol (CH3OH) at right to answer the following: a. How many kJ of energy is…

A:

Q: A 337.2 g sample of acetone gas with a temperature of 56.0°C is converted to a liquid with a…

A: When a substance changes from solid to liquid state, a number of parameters undergo changes. These…

Q: For propane, the ∆H° of vaporization is 22.9 kJ/mol and the ∆S° of vaporization is 99.0 J/mol･K. At…

A: Concept:  Boiling point: It is a temperature on which the gass phase and liquid phase are in…

Q: What amount of heat (in kJ) is required to convert 22.0 g of an unknown liquid (MM = 83.21 g/mol) at…

A:

Q: nknown liquid (MM = 83.21 g/mol) at 19.2 °C to a gas at 93.5 °C? %3D =pecific heat capacity of…

A: Amount of heat required., q1 = mass x specific heat x change in temperature q2  = mass x ∆H

Q: How much energy is required to vaporize 188 g of butane (C 4H 10) at its boiling point, if its ΔH…

A:

Q: How much energy (kJ) is needed to heat 25.0 g of isopropyl alcohol from -25.0°C to +90.0°C? Molar…

A: we have to calculate the energy needed to heat isopropyl alcohol

Q: A- E F temperature (K) A O D Which line must the temperature and pressure have crossed if a solid…

A:

Q: The freezing point of ammonia (NH3,17.04 g/mol) is -77.73°C. In an experiment, 367.2 grams of solids…

A: Given,Mass of water = 250gSpecific heat of ammonia = 4.742 J/go C

Q: A 4.7-L sealed bottle containing 0.33 g of liquid ethanol,C₂H₆O, is placed in a refrigerator and…

A:

Q: . A cooling bath is prepared in a laboratory by mixingchunks of solid CO2 with ethanol. CO2(s)…

A: cooling bath is a liquid mixture which is used to maintain low temperatures, typically between (-13…

Q: The Clausius-Clapeyron Equation (hopefully introduced to you in General Chemistry) can be used to…

A:

Q: -0.0146KJ /g 432-50.0--6.8.× 50.0g x4.18579°C-F1420J C. How much energy is lost by the water when it…

A: Your answers for options-(a), (b), and (c) are right.

Q: The following compounds, listed with their boiling points, are liquid at –10ºC: butane, –0.5ºC;…

A: The boiling point and vapour pressure of solution are related inversely to each other.

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: What amount of heat (in kJ) is required to convert 16.5 g of an unknown liquid (MM = 83.21 g/mol) at…

A:

Q: The following information is given for n-pentane at 1 atm: boiling point = 36.20 °C AHvap(36.20 °C)…

A: The question is based on the concept of Hess law. IT states that net energy change during the…

Q: 9) Ethanol has a AHvap of 38.56 kJ/mol and a normal boiling point of 78.37 °C (P, Pvan for ethanol…

A: Answer (9) Given :  ∆Hvap = 38.56 kJ/mol Normal boiling point (T1) = 78.37 ℃ = 78.37 + 273.15 K =…

Q: Which region includes the lowest pressures and highest temperatures at which the phase of X is…

A: Phase diagram: The phase diagram represents the different phases of the substance and the pressure…

Q: Octane(C8H18) is a hydrocarbon found in crude oil. Thermochemical data for octane is provided below.…

A: The phase of a substance changes when external energy or heat is provided to it. The value of…

Q: Formula: C3H6O Melting Point: -94.0°C Boiling Point: 56.0°C Density of liquid: 0.791 g/mL Heat of…

A:

Q: • At its boiling point (-61 C), what mass of H2S is vaporized with 100 kJ? The AHvap of H2S, is 18.8…

A: Given : Heat used = 100 KJ And ΔHvap = 18.8 KJ/mol

Q: Carbon tetrachloride, CCl 4 , once used as a dry cleaning solvent, but is no longer used because it…

A: Given: Temperature (T1) = 57.8 oC = 330.95 K Vapor pressure  (P1) = 54.0 kPa = 0.533 atm Enthalpy of…

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: hat weight of NaCl in 800g acetone is needed to bring the boiling point to 60°C? (Boiling point of…

A: weight of NaCl =? Mass of solvent = 800g = 0.8 kg Boiling point of solution = Tb = 60°C Boiling…

Q: A 459.3 gram sample of an unknown substance (MM = 92.41 g/mol) is heated from -23.1 °C to 51.8 °C.…

A:

Q: The Δ?vapΔ⁢Hvap of a certain compound is 47.57 kJ·mol−147.57 kJ·mol−1 and its Δ?vapΔ⁢Svap is 67.46…

A:

Q: What is the vapor pressure of ethanol in (mmHg) at 62.5°C if it's vapor pressure is 400.0 mmHq at…

A: The Clausius–Clapeyron  deremines  the relation between temperature and vapor pressure, It helps us…

Q: 5- What is the the boiling point of toluene for a pressure of 320 mmHg. Assume the normal boiling…

A: Given:  Normal boiling point (T1) = 75.1°C = 348.1 K  Initial Pressure (P1) = 1 atm  = 760 mm Hg…

Q: Cyclohexane freezes at 6.50 °C. What is its ΔS° of freezing if its ΔH° of fusion is 2.68 kJ/mol?…

A: Given: ΔH° of fusion is 2.68 kJ/mol Freezing point is 6.50 °C.

Q: Ethylene glycol 1HOCH2CH2OH2, the major substance inantifreeze, has a normal boiling point of 198…

A: a) When hydrogen is covalently bonded with a more electronegative atom such as N, O and F, the…

Q: The following information is given for mercury at latm: AHvap(357°C)= 59.3 kJ/mol boiling point 357…

A: Given, mass of sample = 49.0g.Moles of mercury can be calculated as

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.