Question

A 4.21 kg lead billet is to be melted for a casting operation. Lead has a...

A 4.21 kg lead billet is to be melted for a casting operation. Lead has a melting point of 328°C, a specific heat capacity of 128 J/(kg·°C), and a latent heat of fusion of 23,200 J/kg. (use correct number of significant figures in your final answer.)

(a) Calculate the amount of heat required to heat the lead from a starting temperature of 21.7°C to its melting point of 328°C.

(b) Calculate the amount of heat needed to melt the lead brick once it reaches 328°C.

Homework Answers

Know the answer?
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
Similar Questions
A 2.03-g lead bullet traveling at 508 m/s strikes a target, converting its kinetic energy into...
A 2.03-g lead bullet traveling at 508 m/s strikes a target, converting its kinetic energy into thermal energy. Its initial temperature is 40.0°C. The specific heat is 128 J/(kg · °C), latent heat of fusion is 24.5 kJ/kg, and the melting point of lead is 327°C. (a) Find the available kinetic energy of the bullet. J (b) Find the heat required to melt the bullet. J
Answer the following questions: a) A sample of lead with a mass of 1.45 kg is...
Answer the following questions: a) A sample of lead with a mass of 1.45 kg is heated until it reaches its melting point at 330 C. The lead is then heated further until it has entirely melted. During this process, the lead absorbs a total of 4.46 * 10 ^ 4 J as heat. What is the temperature at which the lead is initially heated? b) Gallium melts at 29.78 C, a temperature that can be achieved by the atmosphere...
A home melting pot is used for a metal casting hobby. At the end of a...
A home melting pot is used for a metal casting hobby. At the end of a work period, the pot contains 608 grams of lead at 439°C. How much energy will be released as the molten metal cools, solidifies, and cools further to room temperature, 22°C? Data for lead at 1 atm: Melting point = 328°C Specific heat liquid = 0.138 J/g ⋅ °C Specific heat solid = 0.130 J/g ⋅ °C Heat of fusion = 23.0 J/g __J
Some gun fanciers make their own bullets, which involves melting and casting the lead slugs. How...
Some gun fanciers make their own bullets, which involves melting and casting the lead slugs. How much heat transfer (in J) is needed to raise the temperature and melt 0.650 kg of lead, starting from 21.0°C
A 60 kg block of ice begins at -60 degrees the specific heat of ice is...
A 60 kg block of ice begins at -60 degrees the specific heat of ice is 2090 j/(kg)C. The latent heat of fusion of water is 3.3 x 10^5 and the latent heat of vaporization is 2.3 x 10^6 J/kg. How much energy is required to heat the ice to 0 degrees Celcius (melting point)? How much energy is required to heat the ice from -50C to the melting point and melt the ice? How much energy is required to...
The melting point of aluminum is 660°C, its latent heat of fusion is 4.00 × 105...
The melting point of aluminum is 660°C, its latent heat of fusion is 4.00 × 105 J/kg. How much heat must be added to 900 g of aluminum at 660°C to completely melt it?
An ice cube of mass 0.041 kg and temperature -13 ∘C is heated until it is...
An ice cube of mass 0.041 kg and temperature -13 ∘C is heated until it is now fully melted and at a temperature of 11∘C now. What percentage of the total energy was used to melt the ice? (Assume that there is no heat exchange with any container or the environment.) The specific heat of ice is 2200 J/kg ∘C and the specific heat of water is 4186 J/kg ∘C. The latent heat of fusion of ice is 334000 J/kg...
Estimate the speed that a lead bullet must have in order that it melts completely when...
Estimate the speed that a lead bullet must have in order that it melts completely when it strikes a target. Assume that all the bullet’s kinetic energy goes into heat and that the bullet is initially at 20oC. The specific heat capacity of lead is 130 J / (kg oC), its melting point is at 327oC its latent heat of fusion is 24.5 kJ/kg.
A 0.033 kg glass (with c = 840 J/kg oC) contains 0.281 of lemonade which, due...
A 0.033 kg glass (with c = 840 J/kg oC) contains 0.281 of lemonade which, due to the sugar content, has a specific heat of 4,208 J/kg oC. After putting 0.049 kg of ice into the glass and allowing it to completely melt the final equilibrium temperature of the glass of lemonade is found to be 2.9 oC. intial temperature is 0. (a) Calculate the initial temperature of the lemonade and glass. oC Note the following data for ice/water: specific...
(28.1) Let’s reconsider the 23.5 kg of silver that we warmed and then melted in PS#14....
(28.1) Let’s reconsider the 23.5 kg of silver that we warmed and then melted in PS#14. (a) In warming the silver its entropy [Choose One:] increased remained constant decreased . (b) In melting the silver its entropy [Choose One:] increased remained constant decreased . (c) By what amount did the entropy of the silver change while it was melting? [The latent heat of fusion for Ag is 88 kJ/kg and it melts at TAg = 961 C.] (28.2) A sample...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT