Physics

. How much heat does it take to melt 2.5 kg of lead when it is at its melting point (m.p. = 327.5°C; Hf = 2.04 × 104 J/kg)?

6.2 × 101 J

8.2 × 103 J

5.1 × 104 J

1.7 × 107 J

  1. 👍 0
  2. 👎 0
  3. 👁 170
  1. heat=hf*mass=2.04E4*2.5 J

    1. 👍 0
    2. 👎 0
  2. I DONT WANNA GO DOWN IN THE TUBE STATION AT MIDNIGHT!

    1. 👍 0
    2. 👎 0
    posted by Paul

Respond to this Question

First Name

Your Response

Similar Questions

  1. SCIENCE QUESTION

    LEAD IS A SOFT, DENSE METAL WITH A SPECIFIC HEAT OF 0.028KCAL/KGC, A MELTING POINT OF 328.0C, AND A HEAT FUSION OF5.5KCAL/KG. HOW MUCH HEAT MUST BE PROVIDED TO MELT A 250.0KG SAMPLE OF LEAD WITH A TEMPERATURE OF 20.0C? Figure the

    asked by priscilla on October 7, 2006
  2. physics

    lead is a soft, dense metal with a specific heat of 0.028 kcal/kg degrees C, a melting point of 328.0 degrees C and a heat of fusion of 5.5 kcal/kg. How much heat must be provided to melt a 250.0 kg sample of lead with a

    asked by Erica on November 21, 2006
  3. Physics

    You have a 2.00 kg block of lead. Lead melts at 327.5°C. CPb = 130.0 , and Hf for lead is 2.04 × 104 J/kg. Say you start at room temperature (25.0°C). How much heat must you transfer to melt all the lead?

    asked by Pat on March 18, 2012
  4. Physics

    Help me understand this please You have a 2.00 kg block of lead. Lead melts at 327.5°C. CPb = 130.0 , and Hf for lead is 2.04 × 10^4 J/kg. Say you start at room temperature (25.0°C). How much heat must you transfer to melt

    asked by Me and I on March 25, 2014
  5. physics

    It has been said that sometimes lead bullets melt upon impact. Assume that a bullet with an initial temperature of 301 K receives 73.9 % of the work done on it by a wall on impact as an increase in internal energy. (The melting

    asked by Anonymous on November 5, 2014
  6. physics

    It has been said that sometimes lead bullets melt upon impact. Assume that a bullet with an initial temperature of 295 K receives 73.5 % of the work done on it by a wall on impact as an increase in internal energy. (The melting

    asked by Anonymous on November 12, 2014
  7. Physical Science

    Lead is a soft, dense metal with a specific heat of 0.117 J/goC, a melting point of 328.0 oC, and a heat of fusion of 23012 J/g. How much heat (in kilojoules) must be provided to melt a 350.0 kg sample of lead that is initially at

    asked by Ashley on October 27, 2014
  8. physics

    It has been said that sometimes lead bullets melt upon impact. Assume that a bullet with an initial temperature of 301 K receives 67.9 % of the work done on it by a wall on impact as an increase in internal energy. (The melting

    asked by mehmet kaya on November 18, 2014
  9. Chemisty

    LEAD IS A SOFT, DENSE METAL WITH A SPECIFIC HEAT OF 0.028KCAL/KGC, A MELTING POINT OF 328.0C, AND A HEAT FUSION OF5.5KCAL/KG. HOW MUCH HEAT MUST BE PROVIDED TO MELT A 250.0KG SAMPLE OF LEAD WITH A TEMPERATURE OF 20.0C?

    asked by Jessica on October 23, 2008
  10. physical science

    Lead is a soft, dense metal with a specific heat of 0.028 kcal/kg·C°, a melting point of 328.0°C, and a heat of fusion of 5.5 kcal/kg. How much heat must be provided to melt a 202.2 kg sample of lead with a temperature of

    asked by Anonymous on October 12, 2010
  11. Physical Science

    lead has specific heat of .028kcal/kgC, melting point of 328 degrees C and a heat fusion of 5.5 kcal/kg. how much heat must be provided to melt a 250kg sample of lead with a temperature of 20 degrees Celsius?

    asked by yolanda on April 8, 2011

More Similar Questions