How many kJ of heat are needed to raise the temperature of 50mg of water by...
How many kJ of heat are needed to raise the temperature of 50mg of water by 10.64 degrees C.
Given:
Concentration NaOH = 0.05moles
Molar Enthalpy for dissolution of NaOH = -44517.8J
Molar Mass of NaOH = 40g/mol
Volume of water = 1.71 x10^15L
Homework Answers
Mass of water = 50 mg = 50×10-3 g
Heat needed to raise temperature of 50 mg water by 10.64 degree c
= Mass of water (g) × specific heat of water × temperature change
= 50 × 10-3 ( g) × 4.184 (J/goc) × 10.64 (0c)
= 44.5 J
= 4.45 ×10-2 KJ.
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