100g of water at 25°C is poured into an insulating cup. 50g of ice at 0°C is added to the water. The water is stirred until the temperature of the water has fallen to 0°C.
18g of ice remains unmelted.
The specific heat capacity of water is 4.2 J/gºC.
Which value does this experiment give for the specific latent heat of fusion of ice?
А.
210J/g
B 330 J/g
C 580 J/g
D 770J/g
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The energy released by a chemical reaction can be measured using a calorimeter. when barium hydroxide octahydrate crystals are reacted with dry ammonium chloride inside of a coffee cup calorimeter, the temperature of the 18.00 g of water in the calorimeter decreases from 30.0°c to 8.0°c. the equation for calculating energy absorbed or released by a reaction is: where q is the energy released or absorbed, m is the mass of water in the calorimeter, cp is the specific heat of water, and δt is the observed temperature change. if the specific heat of liquid water is 4.19 j/g·°c, how much energy was absorbed by the reaction?

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