Question

A 200 g block of copper at a temperature of 75°C is dropped into 650 g of water at 35°C. The water is contained in a 400 g glass container. What is the final temperature of the mixture?

Answer 1

Heat loss by the copper will be gained by the glass-water system since the system is assumed to be isolated. Thus if T is the final temperature of the system,we'll have

  

where m_c= mass of copper=200g

c_c= specific heat of copper,

T_c= Initial temperature of the copper

m_w= mass of water= 650g

c_w= specific heat of water,

m_g= mass of glass container= 400g

c_g= specific heat of glass,

Then using all above and given values in above equation,

  

  

  

  

  

  (ANS)