Q3(b)(i). Adiabatic mixing of ice and hot water
1 g of ice at T = 0 °C and 10 g of water at T = 100 °C are mixed in an adiabatic container. What is the temperature within the container when its content reaches equilibrium? Express your answer in K. For H₂O, ΔHmelt = 6.01 kJ/mol and Cp = 75.3 J/(mol K).
Model answer
The free solution for 2022 answers questions 1, 2, 4, 5 and 6, the ones picked in its time plan. Question 3 is answered in full in the IFoS Chemistry Paper I, 2021 to 2025 book, with every part of every paper.
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UPSC Indian Forest Service (Main) Chemistry Paper I: Model Answers 2021 to 2025
- All eight questions of each paper, with the question printed above its answer
- Physical chemistry numericals worked with units; inorganic structures drawn
- Topic-wise weightage and a topic-wise index
Coversadiabatic mixingheat balancecalorimetryenthalpy of fusionfinal temperature
All parts of Question 3
- 3(a) Molecular orbitals of linear BeH₂10 marks
- 3(b)(i) Adiabatic mixing of ice and hot water10 marks
- 3(b)(ii) Trouton rule5 marks
- 3(c) Sulfur phase diagram and metastability15 marks