Physics

Problem

An experiment a sphere of aluminium of mass 0.20 kg is heated upto

150^{\circ}\text{C}

. Immediately, it is put into water of volume 150 cc at

27^{\circ}\text{C}

kept in a calorimeter of water equivalent to 0.025 kg. Final temperature of the system is

40^{\circ}\text{C}

. The specific heat of aluminium is : (take

4.2 \text{ Joule} = 1 \text{ calorie}

) a.

378 \text{ J/kg} \cdot ^{\circ}\text{C}

315 \text{ J/kg} \cdot ^{\circ}\text{C}

476 \text{ J/kg} \cdot ^{\circ}\text{C}

434 \text{ J/kg} \cdot ^{\circ}\text{C}