How much heat (in j) is required to raise the temperature of 15 g of lead from 22 degrees C to 37 degrees C?

  1. The specific heat capacity of lead is 0.13 j/g-K.

    Can you please show me how to do this step by step so I can see what you are doing?

    Answer by Ricki
    All of these use the same equation.

    energy = mass * heat capacity * temperature change


    energy = 15 g * 0.13 J/gC * (37C – 22C)

    The g and C units cancel out leaving you with J (J should always be capitalized by the way)

    29.3 J Since you are adding heat, the sign is positive.

    You likely want to report that as 29 J since all your data has 2 sig figs but follow what your teacher expects.

    On other point, 0.13 J/gK is the same as 0.13 J/gC. A difference of one deg K is the same as a difference of 1 deg C. 1 deg K is NOT the same though as 1 deg C. You can see this for yourself by going from 100 C to 101 C and then converting both to deg K and seeing what the difference is. The difference will be 1 deg C and 1 deg K

  2. Even LL COOL J gave up on his clothing you don’t see him rocking his own clothes anymore. Now all you see him wearing is ed hardy and christian audigier.

    Answer by ImageSavvy
    It just goes to show you can’t be great at everything!!

  3. I have a old house (1901) that have ceiling light fixture in the dining room. The light fixture was connected w/o a electrical J Box and it was working fine. Now that I want to install a new light fixture. When I removed the light fixture, I discoved that there was a pipe coming down from the ceiling. I was told that it was used to be a gas pipe. Should I remove the gas pipe and install a J box or it is not necessary? This is a tenant unit. Is this landlords or tenant’s responsibility?

    Answer by Jeff
    I wouldn’t make any changes without the landlord’s express consent. You would be responsible for any damage if things were to go wrong.

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