Brass is an alloy made from copper & zinc. A 0.55 kg brass sample at 96.7 C is dropped into 2.19kg of water at 4.4C. If the equilibrium temp is 7.0C, what isthe specific heat of wter is 4186 j/kg C.

Question

Brass is an alloy made from copper & zinc.  A 0.55 kg brass sample at 96.7 C is dropped into 2.19kg of water at 4.4C.  If the equilibrium temp is 7.0C, what isthe specific heat of wter is 4186 j/kg C.  
Answer in units of J/kg C

Elena · Answer

m₁ =0.55 kg,t₁ =96.7℃ c₂=4186 J/kg•℃, m₂=2.19 kg, t₂=4.4℃ t= 7℃ Q₁=c₁m₁(t₁-t) Q₂=c₂m₂(t-t₂) Q₁=Q₂ => c₁m₁(t₁-t) = c₂m₂(t-t₂) Solve for c₁