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Heat Related Problems

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Hi, I need some assistance with the following questions:
1) You have two pieces of Al metal - one is a thin piece of Al foil, and the other is a thick block. Both have the same length and width. Which will absorb more heat when set on a hotplate for the same period of time to raise the temperature 5 degrees?

a) Block
b) Foil
c) The heat capacity is the same, so they will absorb the same amount of heat.
d) Heat would actually be released from both the block and foil.

2) Which is true?

a) Delta Hrx is usually measured and reported in KJ/mol.
b) An endothermic reaction gives a +Hrx.
c) The enthalpy of formation of liquid nitrogen is 0 KJ.
d) A phase change from solid to liquid results in a -q value.

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Solution Preview

1. The difference between the foil and the block is the thickness. The thicker the metal, the more mass it has, and therefore will require more heat to raise the temperature by 5 degrees, which is the question. The foil will get hotter if you add the same amount of heat, but the question ...

Solution Summary

The following solution provides the guidance necessary to assist a student in solving these two chemistry-based problems. All concepts are explained in a detailed and understandable manner.

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Describe the pace at which your product will move through the product life cycle and the factors that will impact its movement. How will the product life cycle impact the marketing of your selected product or service involving the following new Orthopedic shoe from Dr. Scholl's.

The product, a new concept in footwear, has a huge product market in that everyone needs and uses footwear. The product, however, is not designed to benefit this entire market group. The heated footwear product is intended to ease discomfort caused by foot related problems and injuries, therefore the product market can be segmented into two parts, initially: people with foot discomfort and people without foot discomfort.
Once the initial segmentation is identified, it is then a matter of identifying target groups within the segment of people with foot discomfort. The following is a list of groups within this segment:
? People who work on their feet all day such as nurses and food service workers
? People with foot injuries which can be eased with heat treatments
? Elderly people with arthritis or other foot problems
? Pregnant women with swelling and foot fatigue
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? People who would use the product for cold weather activities such as skiing and camping, or live in cold weather areas
Each segment represents a target group within the product market. Each segment group has unique needs and attributes, so a different marketing strategy will be required for each.
Identifying Our Target
Our product is footwear which will come in various styles that can ease the tension, fatigue, pain, and just overall discomfort of certain people who suffer from problem feet, spend hours on their feet, and are required to perform various activities on their feet throughout their lives. This footwear will benefit the elderly, nurses, doctors, store clerks, athletes, sales people, and many others. This footwear will basically target the general public because it is designed to provide comfort for anyone in need. Dr. Scholl's design of this battery operated heated footwear, "Comfort Cuddlier," is not designed to heal the feet but to temporarily ease the discomfort of ones feet. The "Comfort Cuddlier" will be a new revolution in comfort for many.
Dr. Scholl's footwear and products can be found in 11 major retail stores and their online stores such as Albertsons, CVS, Eckerd, Kmart, Kroger, Meijer, Rite Aid, Safeway, Target, Walgreens, Walmart, and other online stores. Because Dr. Scholl's is already a popular name to many people and can be found in many locations, adding the new "Comfort Cuddlier" to its collection will make marking of this new product to the general public easy.

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