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Sholpan [36]
3 years ago
8

Environmental engineers minimize the impact of land development on the environment. Please select the best answer from the choic

es provided T F
Chemistry
2 answers:
Nata [24]3 years ago
5 0

The correct answer is - T (True).

The goal and purpose of the environmental engineers is to minimize the impact of the land that is being developed on the environment itself. This is due to the efforts being made that the environment is kept as it is as much as possible, because any damage on it has bad consequences for everyone and everything. So this type of engineers are trying to find the perfect balance between the development of the land for human usage and also to manage to preserve as much as possible the environment and to minimize any damage on it.

Snezhnost [94]3 years ago
3 0

The answer is T (True)

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A spirit burner used 1.00 g methanol to raise the temperature of 100.0 g water in a metal can from 28.00C to 58.0C. Calculate th
Andreas93 [3]

Complete question:

A spirit burner used 1.00 g methanol to raise the temperature of 100.0 g water in a metal can from 28.00C to 58.0C. Calculate the heat of combustion of methanol in kJ/mol.

Answer:

the heat of combustion of the methanol is 402.31 kJ/mol

Explanation:

Given;

mass of water, m_w = 100 g

initial temperature of water, t₁ = 28 ⁰C

final temperature of water, t₂ = 58 ⁰C

specific heat capacity of water = 4.184 J/g⁰C

reacting mass of the methanol, m = 1.00 g

molecular mass of methanol = 32.04 g/mol

number of moles = 1 / 32.04

                             = 0.0312 mol

Apply the principle of conservation of energy;

n\Delta H_{methanol} = Q_{water}\\\\n\Delta H_{methanol} =  mc\Delta t\\\\n\Delta H_{methanol} =  100 \times 4.184\times (58-28)\\\\n\Delta H_{methanol} =  12,552 \ J\\\\n\Delta H_{methanol} =  12.552 \ kJ\\\\\Delta H_{methanol} = \frac{12.552}{n} \\\\H_{methanol} = \frac{12.552 \ kJ}{0.0312 \ mol} \\\\\Delta H_{methanol} = 402.31 \ kJ/mol

Therefore, the heat of combustion of the methanol is 402.31 kJ/mol

                       

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