= 0.032 x 106 J 100°C 6 J hen The time A 100 B 60 C 50 D 30 E 20 t= MCAT медт IV 3 A small mass x kg of metal, specific heat capacity c in J kg 1 K-1, at 60°C is placed on a large mass y kg of ice at 0°C. If I is the specific latent heat of ice in J kg, the mass of ice in kg melted by the metal is A cx/601 B y/xc C 60xc/l D yl/60xc E 60xc/y Longer Questions -1 Q₁ =MCAT Q₂ =M LOT 4 An electrical heater of 2 kW is used to heat 0.5 kg of water in a kettle of heat capacity 400 JK-1. The initial water temperature is 20°C. Neglecting heat losses: (i) how long will it take to heat the water to its boiling point, 100°C? (ii) starting from 20°C, what mass of water is boiled away in 5 min? (Assume for water, specific heat capacity = 4200 J kg 1 K-1 and specific latent heat of vaporisation = 2 x 106 J kg 1.) -1

Fig: 1