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Heat of Fusion Example Problem - Melting Ice

Warmth of Fusion Example Problem - Melting Ice Warmth of combination is the measure of warmth vitality required to change the condition of matter of a substance from a strong to a fluid. Its otherwise called enthalpy of combination. Its units are normally Joules per gram (J/g) or calories per gram (cal/g). This model issue exhibits how to compute the measure of vitality required to soften an example of water ice. Key Takeaways: Heat of Fusion for Melting Ice Warmth of combination is the measure of vitality as warmth that is expected to change the condition of issue from a strong to a fluid (melting).The recipe to compute warmth of combination is: q m ·ÃŽHfNote that the temperature doesn't really change when matter changes state, so its not in the condition or required for the calculation.Except for liquefying helium, warmth of combination is constantly a positive worth. Warmth of Fusion Problem - Melting Ice What is the warmth in Joules required to dissolve 25 grams of ice? What is the warmth in calories?Useful data: warmth of combination of water 334 J/g 80 cal/gSolution: In the issue, the warmth of combination is given. This isnt a number youre expected to know all things being equal. There are science tables that state basic warmth of combination values. To take care of this issue, youll need the recipe that relates heat vitality to mass and warmth of fusion:q m ·ÃŽHfwhereq heat energym massÃŽHf warmth of combination Remember, temperature isn't anyplace in the condition since it doesnt change when matter changes state. The condition is clear, so the key is to ensure youre utilizing the correct units for the appropriate response. To get heat in Joules:q (25 g)x(334 J/g)q 8350 JIts similarly as simple to communicate the warmth as far as calories:q m ·ÃŽHfq (25 g)x(80 cal/g)q 2000 calAnswer:The measure of warmth required to dissolve 25 grams of ice is 8350 Joules or 2000 calories. Note, warmth of combination should be a positive worth (the special case is helium). In the event that you get a negative number, check your math!