Recent Lessons

Show all results for ""

Feature Overview

Ace your exams with our all-in-one platform for creating and sharing quizzes and tests.

Quizzes

Create quizzes and tests automatically from your content using AI.

Flashcards

Automatically turn your notes into digital flashcards.

Share, Export & Embed

Share with classmates or export to Excel and your learning management system.

Stats & Reporting

Auto-grading quizzes and tests with detailed stats and reports.

Mobile Apps

The smarter way to study – wherever you are.

Pricing Schools Business

Features Pricing Schools Business

12 Questions

0 Views

Ch.7 - Thermochemistry

Choose a study mode

Play Quiz

Study Flashcards

Spaced Repetition

Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is a substance said to be in if it is under a pressure of 1 bar and at the temperature of interest?

Standard state (correct)

Thermochemical state

Enthalpy equilibrium state

Standard enthalpy state

According to Hess's Law, how is an overall enthalpy change determined?

By finding the maximum enthalpy change

By dividing the enthalpy changes by the number of steps

By multiplying the enthalpy changes of the individual steps

By taking the sum of the individual enthalpy changes of the steps leading to the overall process (correct)

What property is used to determine the direction of spontaneous change in a process according to the text?

Pressure change

Entropy (correct)

Enthalpy change

Temperature change

What is the criterion for spontaneous change based on, as stated in the text?

A combination of enthalpy and entropy changes (A) Signup and view all the answers

In thermochemistry, what does Enthalpy of Formation refer to?

The enthalpy change in the formation of a compound from its elements in their standard states (A) Signup and view all the answers

Which law states that an overall enthalpy change is the sum of the enthalpy changes of individual steps leading to an overall process?

Hess's Law (A) Signup and view all the answers

Which of the following is a state function?

Internal energy (C) Signup and view all the answers

What is the relationship between the internal energy change, heat, and work, as described by the first law of thermodynamics?

$\Delta U = q + w$ (A) Signup and view all the answers

What is the definition of enthalpy (H) according to the text?

The internal energy (U) of a system plus the pressure-volume product (PV) (C) Signup and view all the answers

What is the relationship between the heat transferred and the enthalpy change in a constant-pressure process?

$q = \Delta H$ (B) Signup and view all the answers

What is the difference between a reversible process and an irreversible process, as described in the text?

A reversible process is accomplished through an infinite number of infinitesimal steps, while an irreversible process is accomplished in one step or a finite series of steps. (C) Signup and view all the answers

Which of the following is the most useful function for describing constant-pressure processes, according to the text?

Enthalpy (H) (C) Signup and view all the answers