The temperature of 170g of water at 50°C is lowered to 5°C by adding certain amount of ice to it. Find the mass of ice added

The temperature of 170g of water at 50°C is lowered to 5°C by adding certain amount of ice to it. Find the mass of ice added.

Given: Specific heat capacity of water = 4200 J kg^-1 °C^-1 and Specific latent heat of ice = 336000 J kg^-1

Answer

m_w c_w θ_w = m_i L + m_i c_w θ_w

170 x 4.2 x 45 = m_i [ 336 + 4.2 x 5 ]

m_i = 90 g