Physics

35 of copper pellets are removed from a 300 oven and immediately dropped into 120 of water at 20 in an insulated cup.What will the new water temperature be?

I'm stuck on this problem and could use some help. I used q pellets = m · Cp · ΔT and q water = m · Cp · ΔT to try and figure out the problem, but am not getting the right answer. Aren't these the equations i use and then solve for Tf. For some reason my numbers aren't working.
Any help would be great.

  1. 👍
  2. 👎
  3. 👁
  1. The sum of the heats gained is zero.

    Heat gained by pellets+heatgained by water=0

    masspellets(Cp)(Tf-300)+masswater(Cw)(Tf-20)=0
    solve for Tf

    1. 👍
    2. 👎
    👤
    bobpursley

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    A piece of copper metal is initially at 100.0°C. It is dropped into a coffee cup calorimeter containing 50.0 g of water at a temperature of 20.0°C. After stirring, the final temperature of both copper and water is 25.0°C.

  2. maths

    When a cake is removed from an oven its temperature is measured at 300 degree F. Three minutes later its temperature is 200 degree F. How long will it take to cool off to a room temperature of 70 degree F?

  3. Multiple Choice

    Physics 2. Which of the following is equivalent to one ampere? (Points : 1) 10 s/10 C 10 C/10 m 1.5 C/1.5 s 15 C/10 s Question 3.3. A stream of moving charges results in a current of 5.6 A. How long does 116 C of charge take to

  4. Calculus (Derivatives)

    A tray of lasagna comes out of the oven at 200°F and is placed on a table where the surrounding room temperature is 70°F. The temperature T (in °F) of the lasagna is given by the function T(t) = e^(4.86753 - t) + 70, where t is

  1. Chemistry

    A piece of copper metal is initially at 100 C. It is dropped into a coffee cup calorimeter containing 50.0 g of water at a temperature of 20 C. After stirring, the final temperature of both copper and water is 25 C Assuming no

  2. Reading

    Read the instructions below and answer the questions Preheat the oven to 350°F. Spray a cookie sheet with a non-stick spray. Roll the previously refrigerated cookie dough into 1 inch balls. Arrange on the cookie sheet 2cm apart.

  3. Physics

    The temperature in an electric oven is 160°C. The temperature at the outer surface in the kitchen is 50°C. The oven ( surface area = 1.6 m2) is insulated with material that has a thickness of 0.02 m and a thermal conductivity of

  4. physics

    4. A microwave oven uses an electronic device called a magnetron to produce microwaves. Microwaves commonly used in ovens have a frequency of 2,450 MHz. (MHz = 106 Hz) The microwaves then pass into the enclosed metal oven cavity

  1. College Physics

    A positively charged rubber rod is moved close to a neutral copper ball that is resting on a nonconducting sheet of plastic. a) Sketch the distribution of the charges on the ball. b) With the rod still close to the ball, a metal

  2. Chemistry

    A piece of copper metal is initially at 100 C. It is dropped into a coffee cup calorimeter containing 50.0 g of water at a temperature of 20 C. After stirring, the final temperature of both copper and water is 25 C Assuming no

  3. Physics

    55) A 200-g block of copper at a temperature of 90 C is dropped into 400g of water at 27 C. The water is contained in a 300-g glass container. What is the final temperature of the mixture?

  4. Chemistry

    A 5.00 g sample of aluminum pellets (specific heat capacity = 0.89 J/°C·g) and a 10.00 g sample of iron pellets (specific heat capacity = 0.45 J/°C·g) are heated to 100.0°C. The mixture of hot iron and aluminum is then

You can view more similar questions or ask a new question.