A50kg block of nickel at 90°c is dropped into an insulated tank that contains 0.5 m3 of liquid water at 25°c. determine the following. a)-is this a control volume or closed system? b)- what is the specific heat of nickel? c)-what is the specific heat of liquid water? d)-what is the temperature when thermal equilibrium has been reached?

a).Control volume

b). = 502.416 J/kg-K

c).   = 4.187 kJ/kg-K

d). = 87.91°C

Explanation:

a). It is a control volume system because mass is varying in the system.

b). Specific heat of nickel is =   502.416 J/kg-K

c). Specific heat of water is   = 4.187 kJ/kg-K

d).We know that

   net  energy transfer = change in internal energy

= 87.91°C

a) Control Volume

b) 0.44 kJ/kg/K

c) 4.18 kJ/kg/K

d) 32°C

Explanation:

a. The system is a control volume because mass can be added and removed from the system.

b) Nickel has a heat capacity of 0.44 kJ/kgK

c) The heat capacity of water at standard conditions is 4.18 kJ/kgK

d)

The thermal equilibrium means that the system heat transfer of the nickel and the water are the same:

The temperature will be 305.03 K which is 32°C