# Assorted General Chemistry Problems

5.38) Consider the following reaction:
CH3OH (g) —> CO (g) + 2 H2 (g) deltaH = +90.7 kJ
a. Is heat absorbed or evolved in the course of this reaction? b. Calculate the amount of heat transferred when 45.0 g of CH3OH (g) is decomposed by this reaction at constant pressure. c. For a given sample of CH3OH, the enthalpy change on reaction is 18.5 kJ. How many grams of hydrogen gas are produced? d. What is the value of &#916;H for the reverse of the previous reaction? How many kilojoules of heat are released when 27.0 g of CO (g) reacts completely with H2 (g) to form CH3OH (g) at constant pressure?

5.56) A 1.800-g sample of phenol (C6H5OH) was burned in a bomb calorimeter whose total heat capacity is 11.66 kJ/°C. The temperature of the calorimeter plus contents increased from 21.36C to 26.37°C. a. Write a balanced chemical equation for the bomb calorimeter reaction. b. What is the heat of combustion per gram of phenol? Per mole of phenol?

Don't use plagiarized sources. Get Your Custom Essay on
Assorted General Chemistry Problems
From \$10/Page

5.64) Given the data
N2 (g) + O2 (g) —> 2NO (g) deltaH = +180.7 kJ
2 NO (g) + O2 (g) —> 2 NO2 (g) deltaH = -113.1 kJ
2 N2O (g) —> 2 N2 (g) + O2 (g) deltaH = -163.2 kJ
Use Hess’s law to calculate deltaH for the reaction
N2O (g) + NO2 (g) —> 3 NO (g)

5.72) Using the values from Thermodynamics Quantities for Selected Substances at 298.15 K (25°C), calculate the value of &#916;H° for each of the following reactions:
a. N2O4 (g) + 4 H2 (g) —> N2 (g) + 4 H2O (g)
b. 2 KOH(s) + CO2 (g) —> K2CO3(s) + H2O (g)
c. SO2 (g) + 2 H2S (g) —> 3/8 S8(s) + 2 H2O (g)
d. Fe2O3(s) + 6 HCl (g) —> 2 FeCl3(s) + 3 H2O (g)

5.114) A sample of a hydrocarbon is combusted completely in O2 (g) to produce 21.38 g CO2 (g), 4.47 g H2O (g), and 311 kJ of heat. a. What is the mass of the hydrocarbon sample that was combusted? b. What is the empirical formula of the hydrocarbon? c. Calculate the value of &#916;H°f per empirical-formula unit of the hydrocarbon. d. Do you think the hydrocarbon is one of those listed in Thermodynamics Quantities for Selected Substances at 298.15 K (25°C)? Explain your answer.

6.54) Which of the following are permissible sets of quantum numbers for an electron in a hydrogen atom: a. n=2, l=1, m1=1; b. n=1, l=0, m1=-1; c. n=4, l=2, m1=-2; d. n=3, l=3, m1=0? For those combinations that are permissible, write the appropriate designation for the subshell to which the orbital belongs.

6.60) a. The average distance from the nucleus of a 3s electron in a chlorine atom is smaller than that for a 3p electron. In light of this fact, which orbital is higher in energy? b. Would you expect it to require more or less energy to remove a 3s electron from the chlorine atom, as compared with a 2p electron? Explain.

7.26) Explain the following variations in atomic or ionic radii:
a. I- > I > I+
b. Ca2+ > Mg2+ > Be2+
c. Fe > Fe2+ > Fe3+

7.50) While the electron affinity of bromine is a negative quantity, it is positive for Kr. Use the electron configurations of the two elements to explain the difference.

7.104) Moseley established the concept of atomic number by studying X rays emitted by the elements. The X rays emitted by some of the elements have the following wavelengths.
Element Wavelength (A)
Ne 14.610
Ca 3.358
Zn 1.435
Zr 0.786
Sn 0.491
a. Calculate the frequency, v, of the X rays emitted by each of the elements, in Hz. b. Using graph paper (or suitable computer software), plot the square root of v versus the atomic number of the element. What do you observe about the plot? c. Explain how the plot in part b allowed Moseley to predict the existence of undiscovered elements. d. Use the result from part b to predict the X ray wavelength emitted by iron. e. A particular element emits X rays with a wavelength of 0.980 A. What element do you think it is? Solution Summary
Assorted General Chemistry Problems are solved with full working shown.To continue with the answer check on mycoursewriter.com/

Order NOW For A 35% Discount!
Pages (550 words)
Approximate price: -

Why Choose Us

Quality Homework Writing

Do you need to ace your test? We have qualified writers to assist you in writing 100% quality homework writing. Mycoursewriter offers students unique and personalized custom papers that help them in getting good grades. Our academic experts will assist you with your dissertation papers, thesis writing, research papers, term papers, and case study homework help. Our writers are experienced and have perfected the art of crafting the best essay writing papers regardless of your academic level. Order now and get our superb homework writing services.

A student needs professional assistance outside class time. Before hiring our writers, they undergo thorough tests and strict educational backgrounds. After passing a test, our writers undergo training to ensure they deliver expert professional papers to our customers. We ensure they meet the timely delivery of papers and follow our customers' provided instructions. Every writer is an ENL writer and is from the USA, Canada, UK, or Australia. Our experts approach papers effectively depending on their area of specialization.

Affordable Price Guarantees

Is the deal too good to be true? Mycoursewriter is the most affordable assignment help website on the market. We consider students' daily needs for academic help. Our paper costs are reasonably priced to approximately 90% of students around the globe. Our main aim is to ensure students achieve academic excellence, and we believe inconsiderable prices should not hinder students from getting quality homework writing help. In case of any dissatisfaction, we offer unlimited revisions and rewrites without extra charges.

Timely delivery of papers

The ultimate deal-breaker in achieving good grades is submitting imitative papers. Plagiarism is a breach of examination standards and has serious consequences. Students need to deliver papers written in their understanding by paraphrasing their research findings and relevant citations. Our expert's primary consideration is providing free plagiarized papers that meet the lecturers' requirements. Our editors will proofread your paper before delivery ad ensure your papers will not be substandard. We guarantee extreme originality, and in case of any customer concerns, we offer a plagiarism report.

All Round the clock Customer Support

Our website is user-friendly and super useful! Mycoursewriter is the most trusted online writing website always available to provide you with assignment writing services that you need. Our primary concern is meeting customer need specifications by our friendly customer support team that Is available all the time. Our website usability is self-learnable but in case of any problem, feel free to contact us directly through our website email: support@mycourserwiter.com. We have diligently satisfied thousands of students, and you can witness this on our sites' review page.

Try it now!

## Calculate the price of your order

We'll send you the first draft for approval by at
Total price:
\$0.00

How it works?

Fill in the order form and provide all details of your assignment.

Proceed with the payment

Choose the payment system that suits you most.

Advantages of Using Our Assignment writing Services

Mycoursewriter welcomes you for superb essay writing services. We are a legit site offering help with your most challenging homework writing assignments at affordable prices. Your essay paper will be assigned to a professional writer who will craft the paper from scratch according to your provided instructions.

## Essay Writing and Proofreading Services

Essay writing is a common assignment writing for most college students. It takes a lot of time to craft a complete perfect essay. Mycourserwiter offers the best essay writing and proofreading services for most college students. Your paper is assigned to an expert writer who does thorough research on fresh ideas and personalizes your essay paper according to your assignment writing guidelines. Our essays are entirely exceptional and undergo a strict procedure that includes papers free from plagiarism and thorough proofreading.