thermochemistry

what is the mass of a lead block that if heated to 100.0 dgrs C and placed in a container with 50.0g of ice at 0.00dgrs C produces a final water sample of 15.0dgrs C? Sh of Pb= 0.128J/g dgrsC step by step solution and answer

q1 for Pb block = mass x sp.h. x (Tf - Ti).
mass Pb = X
sp.h. Pb = listed
Tf = 15.0
Ti = 100.0

q2 for ice at zero degrees to melt to water at zero degrees is mass x delta H fusion. Be sure to use J/g for the unit.
mass = 50.0 g
delta H = ?? J/g.

q3 for water at zero to be heated to 15.0 degrees = mass x sp.h. x (Tf - Ti)
mass H2O = 50 g.
sp.h. water = ?? J/g*C.
Tf = 15.0
Ti = 0.0
q1+q2+q3 = 0
solve for X.


The sum of the heats gained is zero (some lose heat).

Heat gained lead+ heatgainedice=0
m*Cpb*(100-Tf)+ 50*Heatfusionice + 50*cwater*(Tf-0)=0

you are given Tf, solve for m.

  1. 👍 0
  2. 👎 0
  3. 👁 189

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    A sample of lead with a mass of 1.45kg is heated until it reaches its melting point at 330C. The lead is then heated further until it has entirely melted. During this process the lead absorbs a total of 4.46 104J as heat. What is

    asked by Anonymous on February 18, 2018
  2. Physics

    A wooden block and a lead ball are connected by a light string that passes over a frictionless pulley. The block has a mass of 6kg and the ball has a mass of 2kg. after they are released from rest, the block will slide along the

    asked by Sadie on October 17, 2010
  3. Physics

    A lead bullet of mass 50 grams is fired with a velocity of 200m/s into a lead block of mass 950 grams. Given that the lead block can move freely, calculate the kinetic energy after impact and the loss of energy.

    asked by Williams on May 30, 2015
  4. Physics

    (a) How much heat in kcal must be provided for a 0.853 kg block of lead to raise the temperature of 0.015 kg block of ice from -5ºC to 0ºC? (b) How much heat in kcal must be provided for a 0.853 kg block of lead to melt a 0.015

    asked by Hannah on February 5, 2012
  5. Physics-science

    A block of wood has a mass of 3.6kg and specific gravity of 0.6. It is to be loaded with lead of density of 11300 kg per cubic metre so that it floats in water with 0.90 of its volume immersed. What mass of lead is needed? (a) if

    asked by KAZIN BONNY on January 2, 2016
  6. chemistry

    what is the thermal energy change as 175.0g, of water drops from 75.00 dgrs C to 15.50 dgrs C??? q = mass H2O x specific heat water x (Tfinal - Tinitial). mass H2O = 175.0 g specific heat water = 4.184 J/g*C Tf = 15.50 Ti = 75.00

    asked by crystine cole on April 11, 2007
  7. Chemistry

    Lead can be extracted from lead(II) sulfide, PbS, in two stages. Stage 1: Lead(II) sulfide is heated in air. It reacts with oxygen to produce lead(II) oxide and sulfur dioxide. Stage 2: The Lead(II) oxide is then heated in a blast

    asked by Qindan on April 22, 2013
  8. Chemistry

    A 10.0000 g block of aluminum is heated and placed in a stream of oxygen gas, resulting in the formation of aluminum oxide on the surface of the block. The block is cooled and weighed and found to have a mass of 11.6471 g. The

    asked by Dave on September 27, 2017
  9. Chemistry

    A 10.0000 g block of aluminum is heated and placed in a stream of oxygen gas, resulting in the formation of aluminum oxide on the surface of the block. The block is cooled and weighed and found to have a mass of 11.6471 g. The

    asked by Dave on September 26, 2017
  10. Chemistry

    PbO2 + 2H2 = Pb + 2H2O If 478g of lead doixide is heated, what is: a. the number of moles of lead dioxide used? b. the number of moles of lead produced? c. the mass of lead produced? I am stuck.... please help!!

    asked by bobthebuilder on March 22, 2017

More Similar Questions