Melting point (Tm): -94.9C Boiling point (Tb): 110.7C a.) Using the data, find the vapor pressure of toluene at 20C in units of mol/L b.) What is the enthalpy of vaporization (∆?vap ) for toluene in kJ/mol?

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: 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: 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 energy is required to vaporize 37.8 g of benzene (C6H6, molar mass = 78.0 g/mol) at the…

A: Mass of benzene  = 37.8 g molar mass of benzene (C6H6) = 78.0 g/mol boiling point of benzene = 80°C…

Q: Consider a glass of ice water at 0 °C. Moisture from the air is observed to condense on the outer…

A: Given , Latent heat of vaporisation of water Lv=2430 kJkg mass of water , m =7.8 g

Q: The vapor pressure of acetone (C;H,O) at 39.5°C is 400 torr. (a) If the boiling point of acetone is…

A:

Q: A substance boils at 44.3°C under atmospheric conditions. Under 0.308 atm it boils at 12.7°C.…

A:

Q: Liquid ethanol has a normal boiling point of 78.3 degrees celcius and has a heat if vaporization of…

A:

Q: Ethanol (CH:CH2OH) has a boiling point of 78.23 °C. The liquid phase has a specific heat capacity of…

A: Matter have intermolecular force which is responsible for its physical state. Thermal energy may…

Q: ASAP PLEASE!  The boiling point of liquid B is 95.5 °C at 1 atm (760.0 torr). Its vapor pressure at…

A: Given -->  P1 = 325 torr P2 = 760 torr T1 = 73.5 °C = 346.5 K T2 = 95.5 °C  ∆Hvap = ? KJ/mol

Q: Given the thermodynamic information below for ethylene glycol (molar mass = 62.068 g/mol): Normal…

A:

Q: calculate the enthalpy change upon converting 0.9 moles of ice at -5.4 °C to steam at 103°C under a…

A: Given moles of water solid ( ice ) n  = 0.9  moles   The energy required in each process which will…

Q: Determine the normal boiling point of a liquid with vapor pressure 63.8 mmHg at 36.50°C, given that…

A: Accoding to Clausius Clapeyron equation,At normal boling point, the vapor pressure equal= 760 mmHg

Q: Ethanol (CH₃CH₂OH) has a boiling point of 78.23 °C. The liquid phase has a specific heat capacity of…

A: Given that,  Mass of ethanol = 75g Initial temperature Ti = 30°C Final temperature Tf = 78.23°C…

Q: How much heat would be required to convert 234.3 g of solid benzene, C,H(s), at 5.5°C into benzene…

A: Step A C6H6(S) at 5.5⁰Cà C6H6(l) at  5.5⁰C = MxL=234.3x9.92 Q1=2324.256J   Step B C6H6(l) at  5.5⁰C…

Q: calculate the quantity of energy in kj required to change 73.92 grams of liquid water at 38.8…

A: The liquid water is heated to raise the temperature from 38.8 to 100 degree Celsius. Then conversion…

Q: a. Butane melts at -134 °C and boils -0.56°C. The heat of vaporization is 22.44 kJ/mol. What is the…

A: Since you have asked multiple questions, we will solve first one for you. For remaining question,…

Q: From the following vapor pressure data for ethanol, an estimate of the molar heat of vaporization of…

A: According to the celsius clapeyron equation, ln(P2 / P1 ) = (-ΔHvap / R) X ( 1/T2 - 1/T1)  where P2…

Q: Can you explain this problem? Where did the P1 came from? And can you redo the calculation?

A:

Q: A certain liquid has a vapor pressure of 92.0 Torr at 23.0 °C and 279.0 Torr at 45.0 °C. Calculate…

A: Given : We have to calculate delta H vaporization and normal boiling point.

Q: 3. How much energy must be added to 36.1g of ice at 0°C in order to raise its temperature to 25°C?…

A:

Q: If 100.0 g of ice at -10.0°C is placed in 200. g of water at 90.0°C in an insulated container, what…

A: Given : Mass of ice = 100.0 g Initial temperature of ice = -10.0 oC Mass of hot water = 200 g And…

Q: A certain liquid has a vapor pressure of 92.0 Torr at 23.0 °C and 266.0 Torr at 45.0 °C. Calculate…

A: Step 1: An equation describing the mathematical relationship between different temperatures and the…

Q: The enthalpy of fusion of Na is 2 kJ/mol.  The enthalpy of vaporization of Na is 98 kJ/mol.…

A: Since the metal is converted from gas to solid  And since 2 moles of Na is being converted in the…

Q: Methanol has a normal boiling point of 65°C and a heat of vaporization of 35.2 kJ/mol. What is the…

A:

Q: What is AH in kJ for the process of freezing a 48.2 g sample of liquid water at its normal melting…

A: The energy required to convert the physical state from liquid to solid is called latent heat of…

Q: How much heat is released ( in J) when 54.0 g of water at 10.0 °C is cooled to form ice at - 10.0…

A: Given the mass of water, m = 54.0 g  The initial state is water at 10.0 oC.  The final state is ice…

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

A:

Q: The enthalpy of vaporization of water is 40.7 kJ/mol at its boiling point (100°C). Determine Ssys,…

A: Enthalpy of vaporization = 40.7 KJ/mol = 40700 J/mol  Boiling point = 100°C = 100+273 = 373 K ∆Ssym…

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: Ammonia has a normal (1.00 atm) boiling point of -33.3 °C. Under a pressure of 2.00 atm, what is…

A: Clausius-Clapeyron Equation: The Clausius-Clapeyron Equation is used to calculate the vapor pressure…

Q: 3. The normal boiling point of SO, is -10.1°C and its standard enthalpy of vaporization is 24.92…

A: Boiling point = -10.1°C = 262.9 K  Enthalpy of vapourization (∆H) = 24.92 KJ/mole

Q: HI has a normal boiling point of -35.4°C, and its ΔHvap is 21.16 kJ/mol. Calculate the molar entropy…

A: Boiling point, standard enthalpy of vaporization and standard entropy of vaporization are related by…

Q: 3. Diethyl ether (molar mass 74.12 g/mol) boils at 34.6 °C and water (molar mass 18.02 g/mol) boils…

A: The temperature at which vapour pressure of a liquid is equal to the atmospheric pressure is called…

Q: Calculate the total amount of heat needed to convert 22.50 g of solid carbon tetrachloride, CC14, at…

A:

Q: The normal boiling point of a liquid is 82.5 °C. Also, the equilibrium vapor pressure of this liquid…

A: Formula used logp2p1=ΔH2.303RT2-T1T1T2 here P2 = 760 torr , P1 = 320 torr T2= 82.5 °C = 82.5+273 =…

Q: How much energy (in kJ) is required to get a 100.0 g ice cube at -10.0°C to completely melt and then…

A: First calculate the energy to convert from ice to solid, then its fusion heat and then solid to…

Crystal Structures

Solids are present all around us. They have different properties and applications. Diamond and graphite are two well-known solids. Diamond is the hardest material in the world and is used in making jewelry. Graphite on the other hand is soft. The lead of your pencil is graphite. Why are they so different in appearance and properties despite the fact they are chemically the same? Both are allotropes of carbon. The answer lies in the structure, the way constituent particles are arranged in the solids.