JAMB - Chemistry (2020 - No. 25)

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

26.0kj/mol

65.0kj/mol

130.0kj/mol

260.0kj/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