Learning Outcomes

After reading this chapter, the reader will be able to

• State the assumptions of kinetic theory of gases (KTG)

• Explain the concept of pressure and calculate the expression for it

• Demonstrate mathematically the gas laws using the expression for pressure derived from KTG

• Present the kinetic interpretation of temperature

• Derive the expression for specific heat at constant volume 𝐶𝑉 and constant pressure 𝐶𝑃

• Explain the concept of degree of freedom

• Solve numerical problems and multiple choice questions on KTG

2.1 Introduction

The kinetic theory of gases (KTG) is a theoretical model that describes the physical properties of a gaseous system in terms of a large number of submicroscopic particles, such as atoms, molecules, and small particles. These constituent elements are in random motion and collide constantly with each other and also with the walls of the container. Considering the molecular composition and characteristic features of such random motion of the molecules, various macroscopic properties of the gaseous system, such as pressure, temperature, viscosity, thermal conductivity, and mass diffusivity can be explained with the help of KTG. In this theory, it is postulated that the pressure exerted by a gas is due to the collision of atoms or molecules moving at different velocities on the walls of a container. It basically attempts to explain the macroscopic properties that are related to the microscopic phenomenon. The physical properties of solids and liquids, in general, are described by their shape, size, mass, volume, etc. Gases, however, have no definite shape, and size. Furthermore, their mass and volume are not directly measurable. In such cases, the KTG can be successfully applied to extract the physical properties of the gaseous system.

The archaeology of Byzantium is the archaeology of an empire whose chronological bounds, broadly speaking, spanned the fourth through fifteenth century CE. The authors whose works are collected in this handbook examine methods and practice of Byzantine archaeology as well as the materials typically encountered in artifacts produced within the imperial boundaries. Byzantine archaeology is still a relatively young discipline, and, while vast in its scope and ambition, work in the field tends to be challenging to access. This volume aims to remedy this situation by providing current views of the nature of Byzantine archaeology, exploring crucial studies which elucidate salient features of the empire’s people, as well offering glimpses of how things may develop in the near future.

In 2019, the EU legislature introduced a right in favour of press publishers over their press publications. The rationale supporting EU intervention in relation to Article 15 of Directive 2019/790 on Copyright in the Digital Single Market (CDSMD) is multi-fold, ranging from support for press publishers when licensing the use of press publications to ensuring a fair marketplace and the protection of a free and pluralist press in performing its societal functions. Article 15 CDSMD has now been transposed at the national level. Despite the harmonizing objective of EU legislature, the resulting legal landscape across the EU appears fragmented. Focusing on the exclusion of ‘very short extracts’ of press publications and considering selected divergent national transpositions, this chapter investigates whether such divergences will thwart the harmonization objective of 15 CDSMD, whether they are incompatible with EU law, and, if so, what the solutions could be. The chapter’s title question is answered: harmonization is necessary, but where the instrument chosen is a directive, national legislatures must correctly interpret and act within the freedom afforded to them under EU law. In many national transpositions of Article 15 CDSMD, this has not occurred.

This chapter outlines the more than century-long impact of the Left on African American poetry and vice versa from the Industrial Workers of the World (IWW) and the Bolshevik Revolution in the early twentieth century to Black Lives Matter in the early twenty-first. This is an exchange with deep formal and thematic consequences for the development of Black poetry and a crucial mode for the circulation of Black Left ideas, practices, concerns, tropes, and so on, in US society, marking US politics and culture, and, to a significant degree, keeping the Left alive in the contemporary moment when the Left is more a sensibility and culture inspiring relatively loose and ephemeral association rather than consisting of stable and coherent parties and internationals.

This chapter develops a conceptual framework for understanding the Right to Repair (R2R) and its intersection with upcycling within contemporary intellectual property and sustainability discourse. It argues that the right to repair encompasses both negative and positive rights: the former protecting individual freedom from interference in repairing owned goods (‘freedom to repair’), and the latter requiring institutional and manufacturer support to ensure ‘repairability’. These differing conceptions manifest in contrasting policy models. Decentralized, market-oriented approaches in the US emphasizing ownership and autonomy, and centralized, circular economy frameworks in the EU prioritizing product design, durability, and extended producer responsibility.

This chapter provides a comprehensive review of benign hematopoietic disorders affecting white blood cells and platelets. The chapter focuses on acquired and inherited conditions that lead to qualitative and quantitative defects in neutrophils, monocytes, and platelets. Topics include reactive neutrophilia and lymphocytosis, acquired and congenital neutropenia, inherited bone marrow failure syndromes associated with neutropenia and/or thrombocytopenia, and sources of laboratory error in automated white blood cell and platelet counts.