Question

A 357.7-gram sample of an unknown substance (MM = 92.41 g/mol) is heated from -23.1 °C...

A 357.7-gram sample of an unknown substance (MM = 92.41 g/mol) is heated from -23.1 °C to 51.8 °C. (heat capacity of solid = 2.96 J/g・°C; heat capacity of liquid = 1.75 J/g・°C; ∆Hfus = 8.04 kJ/mol; Tf = 17.6 °C)

A.) How much Energy (in KJ) is absorbed/released to heat the solid?

B.) How much energy (in KJ) is absorbed/ released to melt solid?

C.) How much energy (in KJ) is absorbed/ released to heat the liquid?

D.) What is the total amount of energy that must be absorbed/released for the entire process

0 0
Add a comment Improve this question Transcribed image text
Know the answer?
Add Answer to:
A 357.7-gram sample of an unknown substance (MM = 92.41 g/mol) is heated from -23.1 °C...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions
  • please help!!!! A 272.3 gram sample of an unknown substance (MM = 189.50 g/mol) is cooled...

    please help!!!! A 272.3 gram sample of an unknown substance (MM = 189.50 g/mol) is cooled from 233.0 °C to 147.6 °C. (heat capacity of liquid = 1.62 J/g. °C; heat capacity of gas = 1.04 J/g. °C; AHvap = 78.11 kJ/mol; Tb = 160.3 °C) How much energy (in kJ) is absorbed/released to cool the gas? pple A 272.3 gram sample of an unknown substance (MM = 189.50 g/mol) is cooled from 233.0 °C to 147.6 °C. (heat capacity...

  • A 233.9 gram sample of an unknown substance (MM = 189.50 g/mol) is cooled from 233.0...

    A 233.9 gram sample of an unknown substance (MM = 189.50 g/mol) is cooled from 233.0 °C to 147.6 °C. (heat capacity of liquid = 1.62 J/g. °C; heat capacity of gas = 1.04 J/g. °C; AHvap = 78.11 kJ/mol; Tb = 160.3 °C) How much energy (in kJ) is absorbed/released to condense the gas?

  • What amount of heat (in kJ) is required to convert 10.1 g of an unknown solid...

    What amount of heat (in kJ) is required to convert 10.1 g of an unknown solid (MM = 83.21 g/mol) at -5.00 °C to a liquid at 52.3 °C? (heat capacity of solid = 2.39 J/g・°C; heat capacity of liquid = 1.58 J/g・°C; ∆Hfus = 3.72 kJ/mol; Tf = 10.3°C)

  • What amount of heat (in kJ) is required to convert 26.1 g of an unknown solid...

    What amount of heat (in kJ) is required to convert 26.1 g of an unknown solid (MM = 67.44 g/mol) at -15.4 °C to a liquid at 42.7 °C? (heat capacity of solid = 1.95 J/g・°C; heat capacity of liquid = 1.18 J/g・°C; ∆Hfus = 5.72 kJ/mol; Tf = 28.3°C) NOTE: The answer is NOT 4.99

  • How much heat is required to raise a 5.38 g sample of aluminum (26.98 g/mol) from...

    How much heat is required to raise a 5.38 g sample of aluminum (26.98 g/mol) from 29.0°C to a temperature of 894°C? The information below may be useful. Specific heat capacity of Al (solid) = 0.903 J/g x *C Specific heat capacity of Al (liquid) = 1.18 J/g x *C ΔHfusion = 10.7 kJ/mol Melting Point of Al = 660*C

  • How much heat energy is required to convert 15.0 g of solid ethanol at -114.5 °C...

    How much heat energy is required to convert 15.0 g of solid ethanol at -114.5 °C to gasesous ethanol at 143.1 °C? The molar heat of fusion of ethanol is 4.60 kJ/mol and its molar heat of vaporization is 38.56 kJ/mol. Ethanol has a normal melting point of -114.5 °C and a normal boiling point of 78.4 °C. The specific heat capacity of liquid ethanol is 2.45 J/g·°C and that of gaseous ethanol is 1.43 J/g·°C. How much heat energy...

  • How much energy (in kilojoules) is released when 12.6 g of steam at 110.5 ∘C is...

    How much energy (in kilojoules) is released when 12.6 g of steam at 110.5 ∘C is condensed to give liquid water at 67.0 ∘C? The heat of vaporization of liquid water is 40.67 kJ/mol, and the molar heat capacity is 75.3 J/(K⋅mol) for the liquid and 33.6 J/(K⋅mol) for the vapor.

  • How much heat energy is required to convert 45.2 g of a solid iron at 28...

    How much heat energy is required to convert 45.2 g of a solid iron at 28 C to liquid iron at 1538 C? The molar heat of fusion of iron is 13.8 kJ/mol. Iron has a normal melting point of 1538 C. The specific heat capacity of solid iron is 0.449 J/ (g • C). Question 6 of 6 > How much heat energy is required to convert 45.2 g of solid iron at 28 °C to liquid iron at...

  • The following information is given for lead at latm: AH yap(1740 °C) -178 kJ/mol AH fus(328...

    The following information is given for lead at latm: AH yap(1740 °C) -178 kJ/mol AH fus(328 °C) = 4.77 kJ/mol boiling point = 1740 °C melting point = 328 °C specific heat solid= 0.130 J/gºC specific heat liquid = 0.138 J/gºC What is AH in kJ for the process of freezing a 26.3 g sample of liquid lead at its normal melting point of 328 °C. The following information is given for silver at latm: AHvap(2212 °C) = 254 kJ/mol...

  • A 61.93 gram sample of iron (with a specific heat of 0.450 J/g °C) is heated...

    A 61.93 gram sample of iron (with a specific heat of 0.450 J/g °C) is heated to 100.0 °C. It is then transferred to a coffee cup calorimeter containing 40.6 g of water (specific heat of 4.184 J/ g °C) initally at 20.63 °C. If the final temperature of the system is 23.59, what was the heat absorbed (q) of the calorimeter? (total heat absorbed by the water and calorimeter = heat released by the iron)

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT