Chapter 1, Problem 1.131E

Q1. The net potential energy between two adjacent ions, EN, is represented by A В EN pn where En is the net energy in Joule (J), A and B are constants with values of 1.436 J.m and 7.32 × 106 J.nm°, r is the interatomic distance between the two ions in nanometer (nm), and n is a positive number with a value of 8. Using these information, determine the equilibrium spacing between the two ions in nanometer (nm).

Normal body temperature is 98.4°F.  Use your Celsius temperature from the above question (81) to calculate this temperature in Kelvin. To determine the conversion factors (if you can’t remember them), use the following: Freezing point of water = 0 oC = 273.15 K.  Boiling point of water = 100 oC = 373.15 K. Use the correct number of significant figures in your answers.

After sitting on a shelf for a while, a can of soda at a room temperature (69°F) is placed inside a refrigerator and slowly cools. The temperature of the refrigerator is 37°F. Newton's Law of Cooling explains that the temperature of the can of soda will decrease proportionally to the difference between the temperature of the can of soda and the temperature of the refrigerator, as given by the formula below: T = Ta + (To – Ta)e¬kt the temperature surrounding the object To = the initial temperature of the object t = the time in minutes the temperature of the object after t minutes k = decay constant T The can of soda reaches the temperature of 54°F after 40 minutes. Using this information, find the value of k, to the nearest thousandth. Use the resulting equation to determine the Fahrenheit temperature of the can of soda, to the nearest degree, after 95 minutes. Enter only the final temperature into the input box.

On January 22, 1943, in Spearfish, South Dakota, the temperature rose from −4.00°F to 45.0°F over the course of two minutes (the current world record for the fastest recorded temperature change). By how much did the temperature change on the Celsius scale?

Calculate the amount of heat needed to boil 139. g of water (H₂O), beginning from a temperature of 85.3 °C. Round your answer to 3 significant digits. Also, be sure your answer contains a unit symbol. 00 x10 X S

An electric current of 481.0 mA transports 530. uC of charge. Calculate the time this took. Be sure your answer has the correct unit symbol and 3 significant digits. 0 x10 X H 8 S

Expressing amounts of energy in different energy units is necessary to solve many chemistry problems. For practice, complete the following table. The Joule (J) is the SI unit of energy. 1 calorie (cal) = 4.184 J J cal kJ 566 156 0.719

A sample of solid silver oxide with a mass of 11.4 grams was reduced to elemental silver by heating under a flow of methane gas, CH4. The reaction produced 10.6 grams of silver. Write a balanced chemical reaction for the reaction between silver oxide and methane gas. The only products formed in the reaction are solid silver metal, carbon dioxide gas, and water vapor. Include the phases of each reactant and product.

A chemistry student needs 35.0g of acetone for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the student discovers that the density of acetone is ·0.790gcm−3 . Calculate the volume of acetone the student should pour out. Be sure your answer has the correct number of significant digits.