Neco Model Questions Vol1 2022 Physics Question 21
Practice objective / multiple choice question 21 from the 2022 Neco Model Questions Vol1 Physics examination.
A 150 g copper block is heated to an unknown temperature and then placed into a calorimeter containing 200 g of water initially at \(25^{\circ}\text{C}\). After the system reaches equilibrium the temperature rises to \(30^{\circ}\text{C}\) and \(5\) g of water has evaporated. The specific heat capacities are \(c_{\text{Cu}} = 0.385\ \text{J g}^{-1}\!^{\circ}\text{C}^{-1}\) and \(c_{\text{water}} = 4.18\ \text{J g}^{-1}\!^{\circ}\text{C}^{-1}\). The latent heat of vapourisation of water is \(L_{v}=2260\ \text{J g}^{-1}\). Assuming the calorimeter has negligible heat capacity, determine the initial temperature of the copper block (in \(^\circ\text{C}\)).
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About This Question
This is Neco Model Questions Vol1 2022 Physics Question 21. It is one of the objective questions from the 2022 Neco Model Questions Vol1 Physics examination.
Difficulty level: Medium .
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