Chemistry homework help and answers

Chemistry homework help and answers

Thank you for assistance! As a team of well-versed professionals. Chemistry Homework Help And Answers. dedicated to helping students to achieve their academic goals, we ensure that every order is completed by the deadline, all instructions are met, and the /10() Sep 23,  · The Voc in V of the a-SiC:H solar cell can be roughly estimated by the equation: Voc=Egap (J)2q=Egap (eV)2. where q is the elementary charge, Egap (J) is the band gap energy expressed in Joules, and Egap (eV) is the band gap energy Estimated Reading Time: 7 mins Homework Help for Chemistry. , results. Follow. Chemistry is the science that deals with the structure, properties and transformations of the bodies based on their composition. Questions. Academic integrity. Ask a question. Answer. in Chemistry

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What is the open-circuit voltage in V of the PV module if all the solar cells are connected in a series configuration? What is the short-circuit current in A of the PV module if all the solar cells are connected in a series configuration? Now suppose that the PV module mentioned above is set up using a series connection of solar cells with the above mentioned specifications. Two of the solar cells have gone faulty completely stopped generating powerbut fortunately you have bypass diodes connected across the faulty solar cells.

Assume that the bypass diodes are ideal they have a zero voltage drop when conducting. What is the measured open-circuit voltage in V of the above PV module with the faulty solar cells?

Junction C acts as the top cell, junction B as the middle cell, and junction A as the bottom cell. Junction B acts as the top cell, junction C as the middle cell, and junction A as the bottom cell. Junction A acts as the top cell, junction B as the middle cell, and junction C as the bottom cell.

Each junction is illuminated under standard test conditions. where q is the elementary charge, Egap J is the band gap energy expressed in Joules, and Egap eV is the band gap energy expressed in eV. Figure 1 shows a simplication of the AM1. The spectrum is divided in three spectral ranges:.

The hydrogenated silicon carbide material a-SiC:H is a new type of amorphous semiconductor material which has been recently studied for PV applications. This material has a relative large band gap of 2. Imagine we integrate this material in a single junction p-i-n solar cell as shown in Figure 2a below. In which spectral range does this solar cell convert light into charge carriers?

An up converter is a material which can convert two low-energy photons into a higher energy photon. Placing an up converter in our solar cell can help to reduce the spectral mismatch, since it can convert some photons with energy lower than 2 eV, which are not absorbed by the a-SiC:H cell, into a photon with an energy higher than 2 eV.

Figure 2b depicts this possibility. If all photons with energy above that of the band gap of a-SiC:H are absorbed in the a-SiC:H layer, chemistry homework help and answers, in which spectral range can the photons be up-converted so that they contribute to the current in the cell as well?

In that case what would be the short-circuit current density and the efficiency of the solar cell illustrated in Figure 2b? If all photons with energy above that of the band gap of a-SiC:H are absorbed in the p-i-n cell, and converter 1 absorbs only the photons in the spectral range as considered in EQ2.

In that case what would be the short-circuit current density and the efficiency of the solar cell illustrated in Figure 2c? Family Smith has already installed PV in their house. Now, they also want to cover their needs for warm water with solar energy. For this, they consider having a solar thermal water heating system, chemistry homework help and answers. If only half of the hot water needed has to be stored, at least how big, in L, should the storage tank be?

How much will the whole system cost? However, Mr Smith has read an article in the newspaper in which it was claimed that at the moment it is more expensive to install a solar thermal system for water heating than directly use the PV electricity to heat up water, chemistry homework help and answers. Therefore, he wants to make some calculations to check such assessment, chemistry homework help and answers.

Assume that the lifetime of both systems is 20 years and the maintenance costs are also equal for both cases. Which will be the better choice for water heating? In this section, we talked about combining a solar cell with a photoelectrode to form a photoelectrochemical device. Why do we add a solar cell in the system? Because the photoelectrode is not able to produce any voltage difference to drive the reaction Because the photoelectrode is not able to produce any current to drive the reaction Because the voltage difference created in the photoelectrode is not able to produce enough voltage to drive the reaction Because the current created in the photoelectrode is not enough to drive the reaction.

What is the approximate voltage that the solar cell needs to deliver for the photoelectrochemical device to work? Close Menu SOLVED Consider the satellite attitude control system shown in the Figure a. The chemistry homework help and answers of this system exhibits continued oscillations. Purchase Confirmation.

Purchase History. Transaction Failed. Free Turnitin Plagiarism Checker. Chemistry homework help and answers Policy, chemistry homework help and answers. What is the band gap in eV of the absorber layer of the junction A? What is the band gap in eV of the absorber layer of the junction B? Top of Form Junction C acts as the top cell, junction B as the middle cell, and junction A as the bottom cell. Top of Form Because the photoelectrode is not able to produce any voltage difference to drive the reaction Because the photoelectrode is not able to produce any current to drive the chemistry homework help and answers Because the voltage difference created in the photoelectrode is not able to produce enough voltage to drive the reaction Because the current created in the photoelectrode is not enough to drive the reaction What is the approximate voltage that the solar cell needs to deliver for the photoelectrochemical device to work?

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StudyDaddy is a right place for you if you want mastering chemistry homework answers on the highest level! Chemistry Answers. If you have a question, which you can’t solve on your own or if you want to back your answer with credible sources, the best solution will be to contact us and place your request by using a simple online form. Just attach your assignment or any other matter you may face and give Thank you for assistance! As a team of well-versed professionals. Chemistry Homework Help And Answers. dedicated to helping students to achieve their academic goals, we ensure that every order is completed by the deadline, all instructions are met, and the /10() You will need to get assistance from your school if you are having problems entering the answers into your online assignment. Phone support is available Monday-Friday, AMPM ET. You may speak with a member of our customer support team by calling