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.A calorimeter holds 45 g water at 22.0°C. A sample of hot iron is added to the water, and the final temperature of the water and iron is 28.0°C. What is the change in enthalpy associated with the change in the water’s temperature?


Note: The specific heat of water is 4.18 [tex]\frac{j}{g°C}[/tex]


Use the formula ΔH = -cmΔT

Respuesta :

The change in enthalpy associated with the change in the water’s temperature is -1128.6 J

What is Enthalpy change ?

Enthalpy change is the name given to the amount of heat evolved or absorbed in a reaction carried out at constant pressure.

It is given the symbol ΔH, read as "delta H". Note: The term enthalpy change only applies to reactions done at constant pressure.

ΔH = - cmΔT

c = 4.18 J/g°C

T₁ = 22 °C

T₂ = 28 °C

T = T₂-T₁

=28-22°C

=6°C

m=45g

ΔH = -4.18* 45* 6

ΔH = -1128.6 J

The change in enthalpy associated with the change in the water’s temperature is -1128.6 J.

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