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iPad 1:46 PM D UVU Login Servic × 'MyLab and Mast: × ' D Cours MasteringChemis × https/session.masteringchemistry.com/myct/itemvie.. HW Standard Enthalpy of Formation Reaction previous 22 of 24 |next s Standard Enthalpy of Formation Reaction The standard enthapy offor nation H is the enthalpy change that occurs when e acty 1 mol of a corpo nd is formed from its constuent elements under standard condtions. The standard conditions are 1 atm pressure, a temperature of 25 and all the species present at a concentration of 1 M·Atandard enthaples of formation table. rearing Hr values might look something liko this Substance 11 H(g) H2(s) Sr(s) Sr(a)5497 kJ/mol C(g) C(s) N(g) 473 kJ/mol 02(g) O(R) S2(g) 218 kJ/mol o kJ/mol 71 k.J/mol o kJ/mol 249 kJ/mol 129 kJ/mol Part A What balanced chemical equation for the reacton used to calciato H, of SrCOs(s)? fractional coeftficients are required, enter them as a fraction (Le 1/3). Indicate the physical states using the abbreviation (s). (),or (g) for solid, liquid or gas, respectively without indicating alotropes. Use (aq) for aqueous solution Express your answer as a chemical equation My Answers Give UpExplanation / Answer
for formation reaction, we use elements in there standard state
The formation reaction is:
Sr (s) + C (s) + O2 (g) —> SrCO3 (s)
balance it:
The formation reaction is:
Sr (s) + C (s) + 3/2 O2 (g) —> SrCO3 (s)
This is the answer
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