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The standard state of an element is defined as a) its state of matter at pressures...

The standard state of an element is defined as

a) its state of matter at pressures less than 1 atm

b) the energy of the element at room temperature

c) the most stable form of the element under standard thermodynamic conditions

d) the mass of the element of 25C

For which of the followingreaction does delta H rxn = delta H f ?

a) H2(g)+1/8S8(rhombic)->H2S(g)

b) C(diamond)+O2(g)->CO2(g)

c)H2(g)+CuO(s)->H2O(l)+Cu(s)

d) O(g)+O2(g)->O3(g)

e)A, B, and D

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Answer #1

standand state af an element is the mast ahleton hm of elemen und en conditions Standand tempenatune and Pae ssune Standnd demp enata.ne is 298k Standand pnessu Thre Enthalopy _af formation(사4) e g tis-enthalapy fCampaund lakes plase fom ita Censtitent elements Constishuent elements must be in theis &tand and state and all the Case omatian f mole of Hs tak n shi place e mast stable fom of Sulph amnc Hence AH

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