Chemistry for Engineering Students
Chemistry for Engineering Students
4th Edition
ISBN: 9781337398909
Author: Lawrence S. Brown, Tom Holme
Publisher: Cengage Learning
Question
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Chapter 10, Problem 1CO
Interpretation Introduction

Interpretation:

The study has identified the obstacles to sustainable recovery and recycling of plastic solid waste which are technology, quality and demand, cost and capacity, market share and legislation and environmental concerns.

Concept Introduction:

The obstacles are slow upgrading of technology, limited number of machines, slow tooling sector, complicated mold design, bad trouble shooting in processing machine operations and requirement of variety of techniques.

There are also technical obstacles such as identification of sorting and collecting technology. The technical obstacles play major role in diminishing the recovery and recycling industries.

Expert Solution & Answer
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Answer to Problem 1CO

Solution:

The causes to obstacles in the recovery and recycling of plastic solid waste are analysed in terms of economic, environmental and social aspects of sustainability

Explanation of Solution

The causes to obstacles in the recovery and recycling of plastic solid waste in terms of economic, environmental and social aspects of sustainability are:

Economic aspects of sustainability include;

  • Attractive export markets are at long distances.
  • For recycled products there is relatively small local and regional markets.
  • The level of export readiness is limited.
  • The competition from imports is strong.
  • The cost of input material is very high cost of input material.
  • The cost of compliance is high.
  • The cost of logistics is high.
  • High labor cost.
  • The capacity of collection is less.
  • lack of producer responsibility.
  • The research and development are limited.
  • The technological upgrading has a slow pace.
  • Manufacturing of limited machine.
  • Weak tooling sector.
  • Decrease in sorting facilities.
  • Complexity in the mold design.
  • Poor trouble shooting in operation of processing machine.
  • Requirement of variety of techniques.
  • The quality is determined by the price of the recycled material.

Scientific aspects of sustainability include:

  • There is lack of certification to determine quality standards.
  • There is lack of facilities required in quality testing.
  • There is lack of plastic waste management in proper manner.
  • There is lack of responsibility of the producer.
  • Limited research and development.
  • Low domestic demand for recycled products.
  • The demand of high quality for recycled materials.
  • Negative society image against the plastic industries.
Conclusion

The causes to obstacles in the recovery and recycling of plastic solid wastes are analysed in terms of in terms of economic, environmental and social aspects of sustainability.

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Chapter 10 Solutions

Chemistry for Engineering Students

Ch. 10 - Prob. 10.1PAECh. 10 - Prob. 10.2PAECh. 10 - Prob. 10.3PAECh. 10 - Prob. 10.4PAECh. 10 - Prob. 10.5PAECh. 10 - Use the web to learn how many pounds of plastics...Ch. 10 - On the basis of your experience, predict which of...Ch. 10 - In the thermodynamic definition of a spontaneous...Ch. 10 - 1f the combustion of butane is spontaneous, how...Ch. 10 - Identify each of the processes listed as...Ch. 10 - Identify each of the processes listed as...Ch. 10 - Athletic trainers use instant ice packs that can...Ch. 10 - Are any of the following exothermic processes not...Ch. 10 - Enthalpy changes often help predict whether or not...Ch. 10 - When a fossil fuel burns, is that fossil fuel the...Ch. 10 - Murphy's law is a whimsical rule that says that...Ch. 10 - Prob. 10.17PAECh. 10 - Some games include dice with more than six sides....Ch. 10 - How does probability relate to spontaneity?Ch. 10 - Prob. 10.20PAECh. 10 - For each pair of items, tell which has the higher...Ch. 10 - For each process, tell whether the entropy change...Ch. 10 - Without doing a calculation, predict whether the...Ch. 10 - For the following chemical reactions, predict the...Ch. 10 - What happens to the entropy of the universe during...Ch. 10 - Prob. 10.26PAECh. 10 - One statement of the second law of thermodynamics...Ch. 10 - Prob. 10.28PAECh. 10 - Prob. 10.29PAECh. 10 - Which reaction occurs with the greater increase in...Ch. 10 - Which reaction occurs with the greater increase in...Ch. 10 - Methanol is burned as fuel in some race cars. This...Ch. 10 - Limestone is predominantly CaCO3, which can...Ch. 10 - Suppose that you find out that a system has an...Ch. 10 - Use tabulated thermodynamic data to calculate the...Ch. 10 - Prob. 10.36PAECh. 10 - Calculate S for the dissolution of magnesium...Ch. 10 - Calculate the standard entropy change for the...Ch. 10 - Through photosynthesis, plants build molecules of...Ch. 10 - Find websites describing two different attempts to...Ch. 10 - Prob. 10.41PAECh. 10 - Prob. 10.42PAECh. 10 - Under what conditions does G allow us to predict...Ch. 10 - There is another free energy state function, the...Ch. 10 - 10.45 Calculate G at 45°C for reactions for which...Ch. 10 - 10.46 Discuss the effect of temperature change on...Ch. 10 - The reaction CO2(g)+H2(g)CO(g)+H2O(g) is not...Ch. 10 - Prob. 10.48PAECh. 10 - Prob. 10.49PAECh. 10 - For the reaction NO(g)+NO2(g)N2O3(g) , use...Ch. 10 - 10.51 The combustion of acetylene was used in...Ch. 10 - Natural gas (methane) is being used in...Ch. 10 - Silicon forms a series of compounds analogous to...Ch. 10 - Explain why Gf of O2 (g) is zero.Ch. 10 - Using tabulated thermodynamic data, calculate G...Ch. 10 - Using tabulated thermodynamic data, calculate G...Ch. 10 - Calculate G for the dissolution of both sodium...Ch. 10 - Phosphorus exists in multiple solid phases,...Ch. 10 - 10.59 The normal melting point of benzene, C6H6,...Ch. 10 - Prob. 10.60PAECh. 10 - Estimate the temperature range over which each of...Ch. 10 - Recall that incomplete combustion of fossil fuels...Ch. 10 - During polymerization, the system usually becomes...Ch. 10 - Prob. 10.64PAECh. 10 - Prob. 10.65PAECh. 10 - The recycling of polymers represents only one...Ch. 10 - Prob. 10.67PAECh. 10 - When ice melts, its volume decreases. Despite this...Ch. 10 - 10.69 If a sample of air were separated into...Ch. 10 - Prob. 10.70PAECh. 10 - An explosion brings down an old building, leaving...Ch. 10 - Prob. 10.72PAECh. 10 - Prob. 10.73PAECh. 10 - Prob. 10.74PAECh. 10 - Prob. 10.75PAECh. 10 - Some say that the job of an engineer is to fight...Ch. 10 - A beaker of water at 40C (on the left in the...Ch. 10 - Why is it usually easier to use G to determine the...Ch. 10 - The molecular scale pictures below show snapshots...Ch. 10 - Prob. 10.80PAECh. 10 - Diethyl ether is a liquid at normal temperature...Ch. 10 - Calculate the entropy change, S , for the...Ch. 10 - Gallium metal has a melting point of 29.8°C. Use...Ch. 10 - Methane can be produced from CO and H2.The process...Ch. 10 - 10.85 Iodine is not very soluble in water, but it...Ch. 10 - The enthalpy of vaporization for water is 40.65 kJ...Ch. 10 - Determine whether each of the following statements...Ch. 10 - Nickel metal reacts with carbon monoxide to form...Ch. 10 - Polyethylene has a heat capacity of 2,3027 J g-1...Ch. 10 - A key component in many chemical engineering...Ch. 10 - The reaction shown below is involved in the...Ch. 10 - Using only the data given below, determine G for...Ch. 10 - The graph below shows G as a function of...Ch. 10 - Prob. 10.94PAECh. 10 - Prob. 10.95PAECh. 10 - Prob. 10.96PAECh. 10 - Prob. 10.97PAECh. 10 - Prob. 10.98PAECh. 10 - Thermodynamics provides a way to interpret...Ch. 10 - Prob. 10.100PAECh. 10 - 10.101 Fluorine reacts with liquid water to form...Ch. 10 - 10.102 Ammonia can react with oxygen gas to form...Ch. 10 - Prob. 10.103PAECh. 10 - 10.104 (a) When a chemical bond forms, what...
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