Logout Open In App
Open In App
Warning: foreach() argument must be of type array|object, bool given in /var/www/html/web/app/themes/studypress-core-theme/template-parts/header/mobile-offcanvas.php on line 20

Chapter 9: Q8DQ (page 343)

Predict the signs of q and w for the process of boiling water.

Short Answer

Expert verified

For the process of boiling water, the addition of heat to the system will result in a positive value of q.

The heat supplied will result in work done on the system so the value of work w is positive.

Step by step solution

01

Definition of the process of boiling.

When a liquid reaches its boiling point bubbles of gas form in it which rise to the surface and burst into the air is defined as the process of boiling. It takes place only when the vapor pressure becomes equal to the atmospheric pressure.

02

Signs of q and w for the process of boiling water

In boiling of water phase transition takes place and to undergo this transition heat must be added or supplied to the system.

The reaction is endothermic and the addition of heat to the system will result in a positive value of q.

The heat supplied will result in work done on the system so the value of work (w) is positive.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

In a coffee cup calorimeter, 1.60 g of NH4NO3is mixed with 75.0g of water at an initial temperature of 25.00ยฐC. After dissolution of the salt, the final temperature of the calorimeter contents is 23.34ยฐC. Assuming the solution has a heat capacity of 4.18Jยฐ/Cgand assuming no heat loss to the calorimeter, calculate the enthalpy change for the dissolution of NH4NO3in units of kJ/mol.

Consider the dissolution ofCaCl2 :

CaCl2(s)โ†’Ca2+(aq)+2Cl2(aq)โˆ†H=-81.5kJ

An 11.0 g sample of CaCl2is dissolved in 125 g of water, with both substances at 25.0ยฐC. Calculate the final temperature of the solution assuming no heat loss to the surroundings and assuming the solution has a specific heat capacity of 4.18J/ยฐCg.

Photosynthetic plants use the following reaction to produce glucose, cellulose, and more:

6CO2(g)โ€‰+โ€‰6H2O(l)โ†’C6H12O6(s)โ€‰+โ€‰6O2(g)

How might extensive destruction of forests exacerbate the greenhouse effect?

Calculate ฮ”Hfor the reaction

N2H4(l)+O2(g)โ†’N2(g)+2H2O(l)

given the following data:

Equation

H(kJ)

2NH3(g)+3N2O(g)โ†’4N2(g)+3H2O(l)

-1010

N2O(g)+3H2(g)โ†’N2H4(l)+H2O(l)

-317

2NH3(g)+12O2(g)โ†’N2H4(l)+H2O(l)

-143

H2(g)+12O2โ†’H2O(l)

-286

The combustion of methane can be represented as follows:

a. Use this information to determine the value of โˆ†Hfor the combustion of methane to form CO2(g)and 2H2O(l).

b. What isโˆ†Hfo for an element in its standard state? Why is this? Use the figure above to support your answer.

c. How does for the reactionCO2(g)+2H2O(l)โ†’CH4(g)+2O2(g)compare to that of the combustion of methane? Why is this?
See all solutions

Recommended explanations on Chemistry Textbooks

Physical Chemistry

Read Explanation

Organic Chemistry

Read Explanation

Nuclear Chemistry

Read Explanation

The Earths Atmosphere

Read Explanation

Inorganic Chemistry

Read Explanation

Chemical Reactions

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free