{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Chapter 5 - Chapter 5 Thermochemistry Chapter Summary...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 5: Thermochemistry Chapter Summary Introduction and Section 5.1 Thermodynamics  is the study of energy and its transformations. In this chapter we  have focused on  thermochemistry , the transformations of energy--especially heat--during chemical reactions. An object can possess energy in two forms:  Kinetic energy  is the energy due to motion of the object, and  potential  energy  is the energy that an object possesses by virtue of its position relative to other objects. An electron in motion  near a proton, for example, has kinetic energy because of its motion and potential energy because of its electrostatic  attraction to the proton. The SI unit of energy is the  joule  (J):  Another common energy unit is  the  calorie  (cal), which was originally defined as the quantity of energy necessary to increase the temperature of 1 g  of water by 1 ° C:  When we study thermodynamic properties, we define a specific amount of matter as the  system . Everything outside  the system is the  surroundings . When we study a chemical reaction, the system is generally the reactants and  products. A closed system can exchange energy, but not matter, with the surroundings. Energy can be transferred  between the system and the surroundings as work or heat.  Work  is the energy expended to move an object against a  force Heat  is the energy that is transferred from a hotter object to a colder one.  Energy  is the capacity to do work or  to transfer heat. Section 5.2  The  internal energy  of a system is the sum of all the kinetic and potential energies of its component  parts. The internal energy of a system can change because of energy transferred between the system and the  surroundings. The 
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern