Ijmb Model Questions Vol1 2018 Chemistry Question 6

Practice essay / theory question 6 from the 2018 Ijmb Model Questions Vol1 Chemistry examination. This question covers States of Matter .

Ijmb Model Questions Vol1 2018 Chemistry Essay / Theory
Topic: States of Matter
Question 6 IJMB_MODEL_QUESTIONS_VOL1 • 2018 • CHEMISTRY • essay

A 500‑g sample of ice at –10 °C is heated in a closed container at atmospheric pressure. The specific heat capacities are: c₍ice₎ = 2.1 J g⁻¹ K⁻¹, c₍water₎ = 4.18 J g⁻¹ K⁻¹, c₍steam₎ = 2.0 J g⁻¹ K⁻¹. The latent heat of fusion of water is 334 J g⁻¹ and the latent heat of vaporisation is 2260 J g⁻¹.

Question Parts

( a )
Calculate the total amount of heat (in kJ) required to convert the ice at –10 °C completely into steam at 120 °C.
( b )
A heater supplies only 250 kJ of energy to the same 500‑g sample initially at –10 °C. Determine the final state (solid, liquid or gas) and the temperature of the sample after the supplied energy is exhausted.
( c )
Briefly explain why the boiling point of water would change if the experiment were carried out at a pressure of 0.8 atm instead of 1 atm.

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About This Question

This is Ijmb Model Questions Vol1 2018 Chemistry Question 6. It is one of the essay questions from the 2018 Ijmb Model Questions Vol1 Chemistry examination.

The question covers States of Matter .

View More Ijmb Model Questions Vol1 2018 Chemistry Questions More Ijmb Model Questions Vol1 Practice Questions Back to Questions

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