Question

The following information is given for aluminum at 1 atm: boiling point = 2.467E3 °C Hvap(2.467E3°C)...

The following information is given for aluminum at 1 atm: boiling point = 2.467E3 °C Hvap(2.467E3°C) = 1.053E4 J/g melting point = 660.0 °C Hfus(660.0°C) = 398.4 J/g specific heat solid= 0.9000 J/g ⋅ °C specific heat liquid = 1.088 J/g ⋅ °C A 46.10 g sample of liquid aluminum at 951.0 °C is poured into a mold and allowed to cool to 28.0 °C. How many kJ of energy are released in this process. Report the answer as a positive number. __kJ

Science   Chemistry   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Ti = 951.0 oC

Tf = 128.0 oC

Cl = 1.088 J/g.oC

Heat released to convert liquid from 951.0 oC to 660.0 oC

Q1 = m*Cl*(Ti-Tf)

= 46.1 g * 1.088 J/g.oC *(951-660) oC

= 14595.6288 J

Lf = 398.4 J/g

Heat released to convert liquid to solid at 660.0 oC

Q2 = m*Lf

= 46.1g *398.4 J/g

= 18366.24 J

Cs = 0.9 J/g.oC

Heat released to convert solid from 660.0 oC to 128.0 oC

Q3 = m*Cs*(Ti-Tf)

= 46.1 g * 0.9 J/g.oC *(660-128) oC

= 22072.68 J

Total heat released = Q1 + Q2 + Q3

= 14595.6288 J + 18366.24 J + 22072.68 J

= 55035 J

= 55.0 KJ

Answer: 55.0 KJ

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
The following information is given for bismuth at 1 atm: boiling point = 1.627E3 °C Hvap(1.627E3°C)...
The following information is given for bismuth at 1 atm: boiling point = 1.627E3 °C Hvap(1.627E3°C) = 822.9 J/g melting point = 271.0 °C Hfus(271.0°C) = 52.60 J/g specific heat solid= 0.1260 J/g ⋅ °C specific heat liquid = 0.1510 J/g ⋅ °C A 48.90 g sample of liquid bismuth at 504.0 °C is poured into a mold and allowed to cool to 24.0 °C. How many kJ of energy are released in this process. Report the answer as a...
The following information is given for cadmium at 1atm: boiling point = 765.0 °C Hvap(765.0 °C)...
The following information is given for cadmium at 1atm: boiling point = 765.0 °C Hvap(765.0 °C) = 889.6 J/g melting point = 321.0 °C Hfus(321.0 °C) = 54.40 J/g specific heat solid = 0.2300 J/g°C specific heat liquid = 0.2640 J/g°C A 20.60 g sample of liquid cadmium at 375.0 °C is poured into a mold and allowed to cool to 28.0 °C. How many kJ of energy are released in this process. Report the answer as a positive number....
The following information is given for cobalt at 1 atm: boiling point = 3.097E3°C Hvap(3.097E3°C) =...
The following information is given for cobalt at 1 atm: boiling point = 3.097E3°C Hvap(3.097E3°C) = 6.603E3 J/g melting point = 1.495E3°C Hfus(1.495E3°C) = 262.7 J/g specific heat solid = 0.4180 J/g ⋅ °C specific heat liquid = 0.6860 J/g ⋅ °C A 38.00 g sample of solid cobalt is initially at 1.467E3°C. If the sample is heated at constant pressure (P = 1 atm), __ kJ of heat are needed to raise the temperature of the sample to 1.963E3°C.
The following information is given for ether at 1 atm: boiling point = 34.60°C Hvap(34.60°C) =...
The following information is given for ether at 1 atm: boiling point = 34.60°C Hvap(34.60°C) = 357.5 J/g melting point = -116.3°C Hfus(-116.3°C) = 98.10 J/g specific heat gas = 1.460 J/g⋅°C specific heat liquid = 2.320 J/g⋅°C A 27.70 g sample of liquid ether is initially at -5.40°C. If the sample is heated at constant pressure (P = 1 atm), __ kJ of energy are needed to raise the temperature of the sample to 59.40°C.
The following information is given for n-pentane at 1 atm: Tb = 36.20°C Hvap(36.20°C) =  J/g Tm=...
The following information is given for n-pentane at 1 atm: Tb = 36.20°C Hvap(36.20°C) =  J/g Tm= –129.70°C Hfus(–129.70°C) =  J/g Specific heat gas = 1.650 J/g °C Specific heat liquid = 2.280 J/g °C A 47.80 g sample of liquid n-pentane is initially at –30.50°C. If the sample is heated at constant pressure ( = 1 atm),  kJ of energy are needed to raise the temperature of the sample to 51.20°C. ______kJ
The following information is given for ethanol at 1 atm: Boiling Temp = 78.40°C Delta H...
The following information is given for ethanol at 1 atm: Boiling Temp = 78.40°C Delta H vaporization(78.40°C) = 837.0 J/g Melting Temp = –114.50°C Delta H fusion(–114.50°C) = 109.0 J/g Specific heat gas = 1.430 J/g °C Specific heat liquid = 2.460 J/g °C A 45.30 g sample of liquid ethanol is initially at 19.90°C. If the sample is heated at constant pressure (P = 1 atm), ________ kJ of energy are needed to raise the temperature of the sample...
Constants for mercury at 1 atm heat capacity of Hg(l) 28.0 J/(mol·K) melting point 234.32 K...
Constants for mercury at 1 atm heat capacity of Hg(l) 28.0 J/(mol·K) melting point 234.32 K enthalpy of fusion 2.29 kJ/mol Calculate the heat energy released when 12.0 g of liquid mercury at 25.00° C is converted to solid mercury at its melting point. Energy: ?KJ
1) The following information is given for n-pentane at 1 atm: = 36.20°C (36.20°C) =  J/g =...
1) The following information is given for n-pentane at 1 atm: = 36.20°C (36.20°C) =  J/g = –129.70°C (–129.70°C) =  J/g Specific heat gas = 1.650 J/g °C Specific heat liquid = 2.280 J/g °C A 40.00 g sample of liquid n-pentane is initially at –27.30°C. If the sample is heated at constant pressure ( = 1 atm), _______kJ of energy are needed to raise the temperature of the sample to 53.90°C. 2) The following information is given for magnesium at 1...
1- The amount of energy needed to vapourize 786 g of water at its boiling point...
1- The amount of energy needed to vapourize 786 g of water at its boiling point is ____________. ∆Hvap = 2.26 kJ/g                 a.            11,500 kJ                 b.            1,780 kJ                 c.             348 kJ                 d.            2.85x10-3 kJ 2- How much energy is necessary to transform 435.5 g of ice at -8.63°C to steam at 114.8°C? Cs ice = 2.09 J/g°C, ∆Hfus of H2Oice = 0.334 kJ/g, Cs water = 4.184 J/g°C, ∆Hvap of H2O = 2.26 kJ/g, Cs steam...
Information about Acetone (C3H6O) : Boiling Point= 56.1 C Melting Point= -94.7 C Heat of Vaporization=...
Information about Acetone (C3H6O) : Boiling Point= 56.1 C Melting Point= -94.7 C Heat of Vaporization= 31.3 kj/mol Heat of Fusion= 5.71 kj/mol Specific Heat Capacities: Csolid= 1.60 J/g*K Cliquid= 2.20 J/g*K Cgas= 1.30 J/g*K a) Draw a heating curve that starts at -50 C and goes to +100 C. Take into account that since the specific heats are different, the heating rates will also differ. b) What is the total energy change of a process in which 18.4 grams...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT