When solid carbon reacts with oxygen gas to produce carbon dioxide gas. the deltaH (enthalpy change ) value is negative .DeltaH would be on the product side of the equation.
<h3>What is enthalpy change? </h3>
In a thermodynamic system, energy is measured by enthalpy. Enthalpy is a measure of a system's overall heat content and is equal to the system's internal energy plus the sum of its volume and pressure.
Knowing whether q is endothermic or exothermic allows one to characterise the relationship between q and H. An endothermic reaction is one that absorbs heat and demonstrates that heat from the environment is used in the reaction, hence q>0 (positive). For the aforementioned equation, under constant pressure and temperature, if q is positive, then H will also be positive. In a similar manner, heat is transferred to the environment when it is released during an exothermic reaction. Thus, q=0 (negative). Therefore, if q is negative, H will also be negative.
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Answer:
0.03127 fraction of a sample of this nuclide would remain after 12.5 hrs.
Explanation:
Initial mass of the isotope =
Time taken by the sample, t = 12.5 hour
Formula used :
where,
= initial mass of isotope
N = mass of the parent isotope left after the time, (t)
= half life of the isotope = 2.5 hour
= rate constant
Now put all the given values in this formula, we get
0.03127 fraction of a sample of this nuclide would remain after 12.5 hrs.
Answer:
liquid ethanol can be separated from a mixture of ethanol and water by fractional distillation and separation of various components of crude oil. This method works because the liquids in the mixture have different boiling points.
Explanation:
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