How many joules of heat are required to melt 1 lb ice?

To melt 1 pound of ice, approximately 144 British thermal units (BTUs) are needed, which is equivalent to about 152,000 joules. This is based on the latent heat of fusion for ice, which is about 334 joules per gram. Since 1 pound is approximately 454 grams, the total energy required for melting 1 pound of ice is calculated accordingly.