The given question is incomplete. The complete question is
The thermite reaction, in which powdered aluminum reacts with iron oxide, is highly exothermic: 
. Use standard enthalpies of formation to find ΔH∘rxn for the thermite reaction. Express the heat of the reaction in kilojoules to four significant figures.
Answer: ΔH∘rxn for the thermite reaction is -851.5 kJ
Explanation:
The balanced chemical reaction is :
We have to calculate the enthalpy of reaction 
.
![\Delta H^o=[n_{Fe}\times \Delta H_f^0_{(Fe)}+n_{Al_2O_3}\times \Delta H_f^0_{(Al_2O_3)}]-[n_{Al}\times \Delta H_f^0_(Al)+n_{Fe_2O_3}\times \Delta H_f^0_{(Fe_2O_3)}]](https://tex.z-dn.net/?f=%5CDelta%20H%5Eo%3D%5Bn_%7BFe%7D%5Ctimes%20%5CDelta%20H_f%5E0_%7B%28Fe%29%7D%2Bn_%7BAl_2O_3%7D%5Ctimes%20%5CDelta%20H_f%5E0_%7B%28Al_2O_3%29%7D%5D-%5Bn_%7BAl%7D%5Ctimes%20%5CDelta%20H_f%5E0_%28Al%29%2Bn_%7BFe_2O_3%7D%5Ctimes%20%5CDelta%20H_f%5E0_%7B%28Fe_2O_3%29%7D%5D)
where,
We are given:
Putting values in above equation, we get:
![\Delta H^o_{rxn}=[(2\times 0)+(1\times -1675.5)]-[(2\times 0)+(1\times -824.2)]=-851.5kJ](https://tex.z-dn.net/?f=%5CDelta%20H%5Eo_%7Brxn%7D%3D%5B%282%5Ctimes%200%29%2B%281%5Ctimes%20-1675.5%29%5D-%5B%282%5Ctimes%200%29%2B%281%5Ctimes%20-824.2%29%5D%3D-851.5kJ)
ΔH∘rxn for the thermite reaction is -851.5 kJ
Okay its like whipping sweetheart it goes cold to hot from liquid to a solid substance so you would need a constant heat
The correct answer for the question that is being presented above is this one: "16.7 degrees celsius."Glacial acetic acid is the concentrated form of acetic acid, the acid in vinegar. the term glacial refers to the appearance of the solid form, which <span>resembles glacial ice. </span>
Delta H = 24.32 kj/ mol and Delta S = 83.93 j/ mol . k
Protons:
- Have a mass
- Positively charged
- Found inside the nucleus of an atom
Electrons:
- Have a mass. (9.10938188×10−31 kilograms), though this can sometimes be considered negligible due to how small that actually is. Barely factored into atomic mass
- Negatively charged
- Found outside the nucleus in the electron shell
Neutrons:
- Have a mass
- Neutral (no charge)
- Found inside the nucleus of an atom
Atom A:
- 1 proton
- 0 Neutrons
- 1 electron
- Atomic mass of 1
- Atomic number of 1
Atom B:
- 8 Protons
- 10 Neutrons
- 8 electrons
- Atomic mass of 18
- Atomic number of 8
Atomic mass includes the number of protons and neutrons in the nucleus. Atomic number is the number of protons, as this is what defines what type of element the atom is.
