Neco 2021 Physics Question 42
Practice objective / multiple choice question 42 from the 2021 Neco Physics examination.
A mixture contains \(0.20\ \text{kg}\) of ice at \(-10^{\circ}\text{C}\) and \(0.50\ \text{kg}\) of water at \(30^{\circ}\text{C}\). The specific heat capacities are \(c_{\text{ice}}=2.1\ \text{kJ kg}^{-1}\text{K}^{-1}\) and \(c_{\text{water}}=4.18\ \text{kJ kg}^{-1}\text{K}^{-1}\); the latent heat of fusion of ice is \(L_f=334\ \text{kJ kg}^{-1}\). After the ice and water are mixed, the system loses \(10\%\) of the heat released by the water to the surroundings before equilibrium is reached. Calculate the mass of ice that remains unmelted after the process (give your answer in grams, to three significant figures).
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About This Question
This is Neco 2021 Physics Question 42. It is one of the objective questions from the 2021 Neco Physics examination.
Difficulty level: Medium .
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