Physics

Thermal energy question

A 40.0kg sample of concrete has 10% zinc impurity (by mass). If 6.0x10^4J of thermal energy is added to the sample, determine the change in temperature.

  1. 👍 0
  2. 👎 0
  3. 👁 84
asked by Sandara
  1. m₁=36 kg, c₁= 880 J/kg•K,
    m₂=4 kg, c₂=387 J/kg•K

    Q=m₁c₁ΔT + m₂c₂ΔT =
    = ΔT(m₁c₁ + m₂c₂).

    ΔT= Q/(m₁c₁ + m₂c₂)=
    =60000/(36•880+4•387) = 1.8 K

    1. 👍 0
    2. 👎 0
    posted by Elena

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    A student is given a 5.000g sample to analyze composed of tin metal with a small amount of a zinc impurity. The student dissolves the metal in concentrated nitric acid, allows the reaction to continue to completion, and heats the

    asked by Nicholas on September 18, 2017
  2. chemistry

    A student is given a 5.000g sample to analyze composed of tin metal with a small amount of a zinc impurity. The student dissolves the metal in concentrated nitric acid, allows the reaction to continue to completion, and heats the

    asked by elijah on September 15, 2019
  3. chem please help drbob222

    Two objects A and B have the same mass and the same specific heat. Object A is heated from 30°C to 70°C and object B is cooled from 70°C to 30°C. How are the thermal energies of the two objects related after the temperature

    asked by Morgan on November 22, 2014
  4. Physics

    Zero, a hypothetical planet, has a mass of 1.0x10^23 kg, a radius of 3.0x10^6 m, and no atmosphere. A 10 kg space probe is to be launched vertically from its surface. (a) If the probe is launched with an initial kinetic energy of

    asked by Technoboi11 on March 9, 2007
  5. Re: Physics/Math

    Posted by Technoboi11 on Wednesday, March 7, 2007 at 1:09am. Zero, a hypothetical planet, has a mass of 1.0x10^23 kg, a radius of 3.0x10^6 m, and no atmosphere. A 10 kg space probe is to be launched vertically from its surface.

    asked by TechnoBoi11 on March 9, 2007
  6. Chemistry

    A 0.4584 g sample of impure zinc chloride, ZnCl2, FW = 136.3 g/mole, was dissolved in water and excess silver nitrate was added to the solution. The mass of the dry silver chloride, AgCl, FW = 143.3 g/mole, produced was 0.8564 g.

    asked by Anonymous on October 16, 2011
  7. Chemistry

    What is the mass, in grams, of a sample of solid zinc if its temperature changes from 25.7oC to 39.0oC when it absorbs 123 J of heat energy? Specific heat of zinc = 0.388 J/(g oC)

    asked by Mindy on July 21, 2015
  8. Chemistry

    Zinc has three major and two minor isotopes. For this problem, assume that the only isotopes of zinc are the major ones, zinc-64, zinc-66, and zinc-68. The atomic mass of zinc-64 is 63.9291 Da, that of zinc-66 is 65.9260 Da, and

    asked by Jess on May 3, 2013
  9. physics

    what is thermal equilibrim, and what is thermal energy? what are fluid molecules? does convectin involve the movement of matter in a circular manner only? thermal equilibrium: no net flow of heat in or out. thermal energy: The sum

    asked by minerva on January 29, 2007
  10. Chemistry

    A sample of zinc with a mass of 14g was heated to 98 degree celsius in boiling water and then dropped into a beaker containing 4.5x10^4ng of water at 25 degree celsius. when the water and metal came to thermal equilibrium, the

    asked by Ciara on January 23, 2011

More Similar Questions