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RSB [31]
3 years ago
8

Calculate the Standard Enthalpy of the reaction below:

Chemistry
1 answer:
Norma-Jean [14]3 years ago
6 0

Answer:

(we use hess's law) it is so simple but the second reaction is not correct please right it

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Select the correct answer. Why were industrial and agricultural surpluses a problem for the US economy? A. The United States did
almond37 [142]

Answer:

the correct answers among them is C

7 0
3 years ago
Read 2 more answers
A distillation column with a partial reboiler and a total condenser is being used to separate a mixture of benzene, toluene, and
ololo11 [35]

Answer:

11.8.4 Distillation Columns

Distillation columns present a hazard in that they contain large inventories of flammable boiling liquid, usually under pressure. There are a number of situations which may lead to loss of containment of this liquid.

The conditions of operation of the equipment associated with the distillation column, particularly the reboiler and bottoms pump, are severe, so that failure is more probable.

The reduction of hazard in distillation columns by the limitation of inventory has been discussed above. A distillation column has a large input of heat at the reboiler and a large output at the condenser. If cooling at the condenser is lost, the column may suffer overpressure. It is necessary to protect against this by higher pressure design, relief valves, or HIPS. On the other hand, loss of steam at the reboiler can cause underpressure in the column. On columns operating at or near atmospheric pressure, full vacuum design, vacuum breakers, or inert gas injection is needed for protection. Deposition of flammable materials on packing surfaces has led to many fires on opening of distillation column for maintenance.

Another hazard is overpressure due to heat radiation from fire. Again pressure relief devices are required to provide protection.

The protection of distillation columns is one of the topics treated in detail in codes for pressure relief such as APIRP 521. Likewise, it is one of the principal applications of trip systems.

Another quite different hazard in a distillation column is the ingress of water. The rapid expansion of the water as it flashes to steam can create very damaging overpressures.

8 0
2 years ago
What is the percent by mass of oxygen in al2o3 ?
Snezhnost [94]
mr oxygen= 16. 16 x 3= 48
mr Al2O3= 27 + 27 + 48= 102

(48/102) X 100%= 47.05% oxygen
4 0
3 years ago
Which conclusion is supported by the information in the graph?
Molodets [167]

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A. The cost of producing a kilowatt of power with fuel cell will be less than $30 in 2015

4 0
2 years ago
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babymother [125]

Sugar is an example of a compound, while koolaid is an example of a homogeneous mixture (more specifically, a solution). A compound is a combination of 2 or more different kinds of atoms chemically bonded in a set ratio. A mixture is a combination of 2 or more substances.

answer is koolaid is a mixture

6 0
3 years ago
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