Physics, asked by farzanaroni3072, 1 year ago

when zn dust is added to sufficiently large volume

Answers

Answered by 1234qw
0

Knowing the amount of  

CuSO₄ as well as its heat capacity and that it reacted completely, we

can calculate the enthalpy change for this reaction using the formula: Enthalpy change = - (mass of water x specific heat capacity x temperature change)

ΔH* = m x c x Δt

Mass of water (g) = volume of copper sulphate solution (cm^3)

Mass of water = 25 grams

Specific heat capacity = 4.2 J g ^-1 deg^-1

Temperature change = 7.2  degree celsius

Enthalpy change (Joules) = -( 25 x 4.2 x 7.2) J

Molar enthalpy change = Enthalpy change / moles of solute used

Enthalpy change = - 756 J

Moles of solute =0.0125

Molar enthalpy change = -756 / 0.0125 = - 60, 480 Joules = -60.5 kJ mol^-1

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