The sublimation of zinc (mass per mole = 0.0654 kg/mol) takes place at a temperature of 6.00
Question:
The sublimation of zinc (mass per mole = 0.0654 kg/mol) takes place at a temperature of 6.00 × 102 K, and the latent heat of sublimation is 1.99 × 106 J/kg. The pressure remains constant ∆U ring the sublimation. Assume that the zinc vapor can be treated as a monatomic ideal gas and that the volume of solid zinc is negligible compared to the corresponding vapor. Concepts: (i) What is sublimation, and what is the latent heat of sublimation? (ii) When a solid phase changes to a gas phase, does the volume of the material increase or decrease, and by how much? (iii) As the material changes from a solid to a gas, does it do work on the environment, or does the environment do work on it? How much work is involved? (iv) In this problem we begin with heat Q and realize that it is used for two purposes: First, it makes the solid change into a gas, which entails a change ∆U in the internal energy of the material, ∆U = Ugas - Usolid. Second, it allows the expanding material to do work W on the environment. According to the conservation-of-energy principle, how is Q related to ∆U and W? (v) According to the first law of thermodynamics, how is Q related to ∆U and W? Calculations: What is the change in the internal energy of zinc when 1.50 kg of zinc sublimates?
Fantastic news! We've Found the answer you've been seeking!
Step by Step Answer:
Answer rating: 70% (10 reviews)
CONCEPTS i Sublimation is the process whereby a solid phase changes directly into a gas phase in res...View the full answer
Answered By
Charles mwangi
I am a postgraduate in chemistry (Industrial chemistry with management),with writing experience for more than 3 years.I have specialized in content development,questions,term papers and assignments.Majoring in chemistry,information science,management,human resource management,accounting,business law,marketing,psychology,excl expert ,education and engineering.I have tutored in other different platforms where my DNA includes three key aspects i.e,quality papers,timely and free from any academic malpractices.I frequently engage clients in each and every step to ensure quality service delivery.This is to ensure sustainability of the tutoring aspects as well as the credibility of the platform.