1.) Q=mC(T-t)+mLf
Lf=Q-mC(T-t)/m
Lf= 23,889.15cal-(600g)(0.092cal/gdegC)(420degC-20degC)/75g
Lf=24.122cal/g
Convert so you can cancel the unit :)
1.) 100 kJ of heat is added to 600g of zinc at 20 C and 75g of it melts. If the specific heat of zinc is 0.385 kJ/kg-C and it melts at 420 C. What is its heat of fusion?
2.) If all the heat lost by 1kg of water at 0 C when it turns into ice at 0 C could be burn into KE, What would be the speed of ice?
3.) A 1kg block of ice at 0 C falls into a lake water is also at 0 C, 0.010kg of ice melts. What was the minimum altitude from which the ice fall?
I'm confused with the formulas to use :( help please :)
1 answer
1 answer