32g of anhydrous copper(ii)tetraoxosulphate(vi) dissolved in 1dm\(^3\) of water generated 13.0kj of heat. The heat solution is?

  • A 26.0kj/mol
  • B 65.0kj/mol
  • C 130.0kj/mol
  • D 260.0kj/mol
jamb 2020chemistry

The correct answer is B. 65.0kj/mol

32g of CUSO\(_4\) liberate 13.0kj of heat

Molar mass of CUSO\(_4\) = 160g

No. of moles of CUSO\(_4\)  = 32g

No. of moles = 32(mass) / 160(molar mass)

= 0.2 moles

i.e 0.2 = 13kj

1 moles = xkj

: 65KJ

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