Igcse Model Questions Vol1 2025 Chemistry Question 39
Practice objective / multiple choice question 39 from the 2025 Igcse Model Questions Vol1 Chemistry examination.
A 10.0 g sample of a substance has the following data: melting point \(120^{\circ}\text{C}\), boiling point \(250^{\circ}\text{C}\), specific heat capacities \(c_{\text{solid}} = 0.5\ \text{J g}^{-1}\text{K}^{-1}\), \(c_{\text{liquid}} = 0.8\ \text{J g}^{-1}\text{K}^{-1}\), \(c_{\text{gas}} = 0.6\ \text{J g}^{-1}\text{K}^{-1}\); latent heat of fusion \(L_f = 60\ \text{J g}^{-1}\), latent heat of vaporisation \(L_v = 200\ \text{J g}^{-1}\). Starting at \(25^{\circ}\text{C}\), the sample is heated with a constant supply of \(5000\ \text{J}\). Determine the final phase of the substance and its temperature after all the supplied energy has been absorbed.
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About This Question
This is Igcse Model Questions Vol1 2025 Chemistry Question 39. It is one of the objective questions from the 2025 Igcse Model Questions Vol1 Chemistry examination.
Difficulty level: Medium .
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