How much energy must be removed to convert 9.73 g of water at 20.9 oC to...

How much energy must be removed to convert 9.73 g of water at 20.9 oC to an ice cube at -12.0 oC? Give your answer as a positive value in Joules since only positive energy can be removed.. cwater = 4.184 J/goC, cice = 2.03 J/goC, ΔHfus, water = 6.01 kJ/mol

Solutions

Expert Solution

Ti = 20.9
Tf = -12.0
Cl = 4.184 J/g.oC
Heat released to convert liquid from 20.9 oC to 0.0 oC
Q1 = m*Cl*(Ti-Tf)
= 9.73 g * 4.184 J/g.oC *(20.9-0) oC
= 850.8457 J
Lf = 6.01KJ/mol =
6010J/mol
Lets convert mass to mol
Molar mass of H2O = 18.016 g/mol
number of mol
n= mass/molar mass
= 9.73/18.016
= 0.5401 mol
Heat released to convert liquid to solid at 0.0 oC
Q2 = n*Lf
= 0.5401 mol *6010 J/mol
= 3245.8537 J
Cs = 2.03 J/g.oC
Heat released to convert solid from 0.0 oC to -12.0 oC
Q3 = m*Cs*(Ti-Tf)
= 9.73 g * 2.03 J/g.oC *(0--12) oC
= 237.0228 J
Total heat released = Q1 + Q2 + Q3
= 850.8457 J + 3245.8537 J + 237.0228 J
= 4334 J

queen_honey_blossom answered 1 year ago

Next > < Previous

Related Solutions

How much energy must be removed from a 125 g sample of benzene (C6H6) vapor at...

How much energy must be removed from a 125 g sample of benzene (C6H6) vapor at 425.0 K to make it a solid at 200.0 K? Use the following steps to get to your answer. You MUST show your work to receive any credit. The following physical data for benzene may be useful. The quiz will be due at the beginning of class on 2/17/16. ΔHvap = 33.9 kJ/mol ΔHfus = 9.8 kJ/mol Cliq = 1.73 J/g°C Cgas = c...

How much energy must be removed from a 125 g sample of benzene (C6H6) vapor at...

How much energy must be removed from a 125 g sample of benzene (C6H6) vapor at 425.0 K to make it a solid at 200.0 K? Use the following steps to get to your answer. ΔHvap = 33.9 kJ/mol ΔHfus = 9.8 kJ/mol Cliq = 1.73 J/g°C Cgas = 1.06 J/g°C Csol = 1.51 J/g°C Tmelting = 279.0 K Tboiling = 353.0 K 1) Determine number of moles the sample contains. ___________________moles 2) How much energy must be removed to...

a) Determine the amount of heat per gram which must be removed to convert 110 OC...

a) Determine the amount of heat per gram which must be removed to convert 110 OC steam (H2O(g)) into –10 OC ice(H2O(s)), then find the total heat removed if there is 9.50 g of steam. b) For acetic acid (CH3COOH, with one O bonded to an H), acetone (CH3COCH3, with the O bonded only to a C), and carbon tetrachloride (CCl4, see non polar molecules in section 12.10), determine the predominant types of intermolecular attraction for the pure liquids, and...

A.) How much heat energy, in kilojoules, is required to convert 60.0 g of ice at...

A.) How much heat energy, in kilojoules, is required to convert 60.0 g of ice at -18 degrees celcius to water at 25 degrees celcius? B.) How long would it take for 1.50 mol of water at 100 degrees Celsius to be converted completely into steam if heat were added at a constant rate of 24.0 J/s?

If you have 10.0 grams of water vapor at 120.0℃, then how much energy in the form of heat must be removed to cool the water vapor down to ice at -10.0℃?

If you have 10.0 grams of water vapor at 120.0℃, then how much energy in the form of heat must be removed to cool the water vapor down to ice at -10.0℃? Hvap is 44.0 kJ/mol, Hfus is 6.01 kJ/mol, c for H2O(g) is 1.87 J/goC, c for H2O(l) is 4.18 J/goC, c for H2O(s) is 2.01 J/goC

Part A: How much heat energy, in kilojoules, is required to convert 45.0 g of ice...

Part A: How much heat energy, in kilojoules, is required to convert 45.0 g of ice at −18.0 ∘C to water at 25.0 ∘C ? Part B: How long would it take for 1.50 mol of water at 100.0 ∘C to be converted completely into steam if heat were added at a constant rate of 18.0 J/s ?

Part A. How much heat energy, in kilojoules, is required to convert 61.0 g of ice...

Part A. How much heat energy, in kilojoules, is required to convert 61.0 g of ice at −18.0 ∘C to water at 25.0 ∘C ? Express your answer to three significant figures and include the appropriate units. Part B. How long would it take for 1.50 mol of water at 100.0 ∘C to be converted completely into steam if heat were added at a constant rate of 25.0 J/s ? Express your answer to three significant figures and include the...

How much energy is required to convert 14.0 g of ice at −15 °C to 14.0...

How much energy is required to convert 14.0 g of ice at −15 °C to 14.0 g of steam at 114°C? Specific heat capacity, ice: 2.108 J/g·K (at 0°C) Specific heat capacity, water: 4.1801 J/g·K (at 25°C) Specific heat capacity, steam: 2.0784 J/g·K (at 100.°C) ΔHfus = 333.6 J/g (at 0°C) ΔHvap = 2.2567 kJ/g (at 100.°C)

How much heat energy, in kilojoules, is required to convert 32.0 g of ice at −18.0...

How much heat energy, in kilojoules, is required to convert 32.0 g of ice at −18.0 ∘C to water at 25.0 ∘C ? Express your answer to three significant figures and include the appropriate units. How long would it take for 1.50 mol of water at 100.0 ∘C to be converted completely into steam if heat were added at a constant rate of 25.0 J/s ? Express your answer to three significant figures and include the appropriate units.

Subjects