Hi!
When 12.0 g potassium nitrate (KNO3) is dissolved in 100 cm3 of water, the temperature drops by 4.20 °C.
Relative atomic mass: K=39, N=14; O=16
Specific heat capacity of water = 4.2 J g–1 K–1
Heat change = M x C x ΔT
1 cm3 of soltuion = 1 g
(i) Using the above information calculate EACH of the following:
a) The number of KNO3 used in the experiment
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b) The heat change for the reaction
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c) The enthalpy change in kJ in mol –1 for the reaction
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ii) State ONE assumption you made in your calculation.
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May I, kindly, receive some assistance with this question, please?