5. Find the quantity of heat required to melt completely 200g of lead initially at 27C given that, for lead: melting point = 327 C, mean specific heat capacity = 0.14 j/kg , specific latent heat of fusion = 270j/kg.

If the heat is supplied to the lead at rate of 30 joules per second find:
a) the time taken to bring the lead to its melting point
b) the additional time required to melt it.

10 points! will mark brainiest! in a heat engine if 1,000 j of heat enters the system and the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2,000 j 1: write the equation 2: list out your known variables 3: plug the numbers into the equations 4: solve 5: write your solution statement that includes initial energy and final energy added you so much!