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Hello.
Can you assist me with the calorific value of H2S and CH4 and a reference to that information?
Thank you
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In 2010 the acgih reduced the threshold limit value for hydrogen sulfide from 15 parts per million to 10 parts per million?
The American Conference of Governmental Industrial Hygienists (ACGIH) reduced the Threshold Limit Value (TLV) for hydrogen sulfide from 15 parts per million (ppm) to 10 ppm in 2010. This change was made to better protect workers from the health hazards associated with hydrogen sulfide exposure. Compliance with this lower TLV helps ensure safer working conditions and reduce the risk of adverse health effects.
What is TLV for hydrogen sulfide?
The TLV for hydrogen sulfide is 10 parts per million (ppm) for an 8-hour time-weighted average exposure. Concentrations above this level may cause adverse health effects in workers over time.
Does the pH scale indicate the consentration of hydrogen ions or hydroxide ions?
The pH scale indicates the concentration of hydrogen ions in a solution. A lower pH value indicates a higher concentration of hydrogen ions, while a higher pH value indicates a lower concentration of hydrogen ions.
How is the amount of hydrogen ions in solution related to the pH of a solution?
The pH of a solution is a measure of the concentration of hydrogen ions (H+) in that solution. A higher concentration of hydrogen ions results in a lower pH value, making the solution more acidic. Conversely, a lower concentration of hydrogen ions leads to a higher pH value, indicating a more basic solution.
What is the concentration of hydrogen ions commonly expressed as?
The concentration of hydrogen ions is commonly expressed as pH, which measures the acidity or basicity of a solution on a scale of 0 to 14. A lower pH value indicates a higher concentration of hydrogen ions and a more acidic solution, while a higher pH value indicates a lower concentration of hydrogen ions and a more basic solution.
In 2010 the acgih reduced the threshold limit value for hydrogen sulfide from 15 parts per million to 10 parts per million?
The American Conference of Governmental Industrial Hygienists (ACGIH) reduced the Threshold Limit Value (TLV) for hydrogen sulfide from 15 parts per million (ppm) to 10 ppm in 2010. This change was made to better protect workers from the health hazards associated with hydrogen sulfide exposure. Compliance with this lower TLV helps ensure safer working conditions and reduce the risk of adverse health effects.
What is the heating value of diesel fuel?
Lower Heating Value (LHV) MJ/kg = 43.4 Higher Heating Value (HHV) MJ/kg = 46.5
What is the pka of Sodium sulfide?
Sodium sulfide (Na₂S) itself does not have a pKa value because it is a salt and does not donate protons in solution. However, it dissociates in water to produce sulfide ions (S²⁻), which are the conjugate base of hydrogen sulfide (H₂S). The pKa of H₂S, which is relevant for understanding the acidity of sulfide ion, is approximately 7.0 for its first dissociation.
What is TLV for hydrogen sulfide?
The TLV for hydrogen sulfide is 10 parts per million (ppm) for an 8-hour time-weighted average exposure. Concentrations above this level may cause adverse health effects in workers over time.
What is the lower heating value of carbon dioxide?
Zero . the heating value in general refer to the amount of energy released per each meter cube of the element combusted. CO2 is noncombustible gas.
What is the difference between Gross heating Value and Net heating value?
The heating value isthe amount of heat produced by combustion of a unit quantity of a fuelWe differentiate between gross and net heating values:Gross (or high, upper) Heating ValueThe gross or high heating value is the amount of heat produced by the complete combustion of a unit quantity of fuel. The gross heating value is obtained whenall products of the combustion are cooled down to the temperature before the combustionthe water vapor formed during combustion is condensedNet (or lower) Heating ValueThe net or lower heating value is obtained by subtracting the latent heat of vaporization of the water vapor formed by the combustionfrom the gross or higher heating value.For further information Contact: Tauseef Awan email adress microengineer.tauseef@gmail.com mob:+92306-8859595
Does the pH scale indicate the consentration of hydrogen ions or hydroxide ions?
The pH scale indicates the concentration of hydrogen ions in a solution. A lower pH value indicates a higher concentration of hydrogen ions, while a higher pH value indicates a lower concentration of hydrogen ions.
How is the amount of hydrogen ions in solution related to the pH of a solution?
The pH of a solution is a measure of the concentration of hydrogen ions (H+) in that solution. A higher concentration of hydrogen ions results in a lower pH value, making the solution more acidic. Conversely, a lower concentration of hydrogen ions leads to a higher pH value, indicating a more basic solution.
What would happen to the PH level if more hydrogen?
Adding more hydrogen would cause more acidity thus a lower pH value.
What is the concentration of hydrogen ions commonly expressed as?
The concentration of hydrogen ions is commonly expressed as pH, which measures the acidity or basicity of a solution on a scale of 0 to 14. A lower pH value indicates a higher concentration of hydrogen ions and a more acidic solution, while a higher pH value indicates a lower concentration of hydrogen ions and a more basic solution.
When a fuel is burnt and water is released in the liquid phase the heating value is called?
When a fuel is burnt and water is released in the liquid phase, the heating value is called the "lower heating value" (LHV) or "net calorific value." This measurement accounts for the energy released during combustion, excluding the energy contained in the water vapor produced, which remains in the gaseous state. In contrast, the "higher heating value" (HHV) includes the total energy released, including the condensation of water vapor back into liquid form.
What is the physical basis of pH?
pH is a measure of the concentration of hydrogen ions in a solution. It is based on the negative logarithm of the hydrogen ion concentration. A lower pH value indicates a higher concentration of hydrogen ions, making the solution more acidic, while a higher pH value indicates a lower concentration of hydrogen ions, making the solution more basic.
