23.6 g of calcium chloride (110.98) is dissolved in water in a calorimeter. T rose from 25.0°C to 38.7°C. Heat capacity of solution & calorimeter = 1258 J/°C. What is enthalpy change when 1 mol CaCl2 dissolves?

Enthalpy Change when 1 mole CaCl₂ dissolves

= - 81.13 kj/mole

Explanation:

Given information

    Mass of CaCl₂ = 23.6 g

Temperature changes from 25.0°C to 38.7°C

Heat capacity of solution & calorimeter (C) = 1258 J/°C

We know               Q = C x ΔT

                   ⇒ Heat released =  1258 x (38.7 - 25)

                                                = 1.7234 x 10⁴ J

                                                = 17.2 Kilo-joule

Thus 23.6 g is equivalent to 1.7234 x 10⁴ J or 17.2 Kilo-joule  of heat energy

Molar mass of calcium chloride (110.98)

Enthalpy Change when 1 mole CaCl₂ dissolves

                      =

the earth would become to overheated and everything alive on it will eventually die from overheating. plants will eventually die as well, water will evaporate, and it will be nothing but a hot planet without anything living on it.