A 90-W immersion heater is used to supply energy for five minutes. The energy supplied is used to completely melt 180g of a solid at is melting point. Neglecting energy losses to the surroundings, calculate the specific latent heat of fusion of the solid
0.5Jg-1
2.5Jg-1
15.0Jg-1
450.0Jg-1
150Jg-1
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The selected answer is wrong:
the 5 minutes should be converted to seconds,therefore Pt=ML,where P=90,t=5*60,m=180g,therefore L=pt/m = 90*5*60/180=150
my school whats this na, the time should be converted to seconds before working with it u just did wuru wuru to the answer 🧐🧐
The selected answer is wrong:
Answer is 150 not 2.5, t, time that is used should be in seconds and not minutes, 5 minutes will be 5*60 = 300 seconds, hence, L = pt/m = 90*300/180 = 150Jg-1
Pls, the time is in minutes, we meet to change it to seconds. Final answer is E 150J, NOT B
