Question

Help please! I'll give a medal and fan

Answer 1

You have a 2.00 kg block of lead. Lead melts at 327.5 Celsius. CPb = 130.0 J/kg * Celsius, and Hf for lead is 2.04 * 10^4 J/kg. Say you start at room temperature (25.0 Celsius). How much heat must you transfer to melt all the lead?

Answer 2

@Directrix @divu.mkr @freckles @Godlovesme @perl @ybarrap

Answer 3

Ummmmmmmmmmm???????

Answer 4

@iambatman

Answer 5

heat= heataddedToIncreaseTemp+ heataddedToMelt
= 2kg*CPb*(327.5-25)+2kg*Hf
327.5x25.0=302.5 T= 302.5C q=2.00kg(130.0 kqc) (302.5c) q=H&M
Q=78,650J Q=2.04x10^4 j/kg (2.00g)=40,800J
Q=119,450J „³ 119,000J

Answer 6

That's how much heat that would be transferred to melt all the lead?

Answer 7

Yes which is 2kg*Cpb*(327.5-25)+2kg*Hf which is q=Heat transferred to melt the Lead

Answer 8

So, 119,000 J is the answer?

Answer 9

Thank you so much!

Answer 10

Youre Welcome

Answer 11

Wait, is the answer 119,450 J or 119,000 J? @Ijada123

Answer 12

Its 119,000 J

Answer 13

Alright. Thank you!

Answer 14

Lml, Youre Welcome Again!