Chemistry

posted by .

106 g of iron at 84.0°C are placed in contact with 205 g of silver at 11.0°C. If no heat is lost to the surroundings, what is the final temperature of the metals? The specific heat of iron is 0.418 J/g·°C and that of silver is 0.251 J/g·°C.

92.0 g of a metal at 92.0°C are added to 53.0 g of water at 30.6°C. When the system reaches constant temperature, the temperature is 38.7°C. What is the specific heat of the metal? The specific heat of water is 4.184 J/g·°C.

  • Chemistry -

    heat lost by Fe + heat gained by Ag = 0
    [mass Fe x specific heat Fe x (Tfinal-Tintial)] + [mass Ag x specific heat Ag x (Tfinal-Tinitial)] = 0

    Substitute and solve for Tfinal.
    The second problem is worked the same way.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Chemistry

    A 35g sample of Fe is dropped into 80g of water at 20 degrees Celsius. What is the final (equilibrium) temperature of the iron/water?
  2. Chemistry

    A 30 ounce iron bar at 425 degrees Fahrenheit is placed in 2.00 quarts of water at 80.0 degrees Fahrenheit. What will be the change in temperature of the iron bar in degrees Fahrenheit?
  3. Chemistry

    Calculate the final temperature when 20.0 g at 60 *C iron is put into 50.0 ml of 20 *C water. The specific heat of iron is 0.449 J/g*C and that of water is 4.184*C. (Assume no heat is lost to the container or the surrounndings.)
  4. chemistry

    a sheet of gold weighing 10.0g and at a temperature of 18.0 degrees c is placed flat on a sheet of iron weighing 20.0g and a tenp. of 55.6 degrees c. what is the final temp. of the combined metals?
  5. Chemistry

    1) Determine the amount of heat in kJ given off when 1.26 x 10^4 g of NO2 are produced according to the equation: 2NO (g) + O2 (g) --> 2NO2 (g) and delta (H) = 483.6 kJ/mol 2) A sheet of gold weighing 10 g and at a temperature of …
  6. CHEMISTRY

    Suppose a sample of hot iron is dropped in a cup of room temperature water. a) what happens to the temperature of the iron & water?
  7. Chemistry

    3490 J of heat are added to a 20.4 g sample of iron at 20◦C. What is the final temperature of the iron?
  8. Physics

    A 0.300 kg iron horseshoe that is initially at 550°C is dropped into a bucket containing 19.4 kg of water at 21.1°C. What is the final equilibrium temperature (in °C)?
  9. chemistry

    A sheet of gold weighing 11.4 g and at a temperature of 15.6°C is placed flat on a sheet of iron weighing 24.2 g and at a temperature of 54.9°C. What is the final temperature of the combined metals?
  10. chemistry

    60.0 g of iron that has an initial temperature of 250 degrees C and 60.0 g of gold that has an initial temperature of 45.0 degrees C are brought into contact with one another. Assuming no heat is lost to the surroundings, what will …

More Similar Questions