A 400W immersion heater is used to heat a liquid of mass 0.5kg. lf the temperature of the liquid increases by 2.5^oC in one second, calculate the specific heat capacity of the liquid (Neglect heat losses to the surroundings)

• A 80 Jkg^-1K^-1
• B 320Jkg^-1K^-1
• C 500Jkg^-1K^-1
• D 1200J kg^-1K^-1
• E 2000J kg^-1K^-1.