How much energy is needed to melt 100g of water- -Hv-540 cal-g -Hf-80 cal-g Cwater-1 cal-goC

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Hess' Law

How much ener...

Question

How much energy is needed to melt $100 g$ of water?
$Δ H_{v} = 540 c a l / g$
$Δ H_{f} = 80 c a l / g$
$C_{w a t e r} = 1 c a l / g^{o} C$

640 c a l

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8000 c a l

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54, 000 c a l

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180 c a l

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Solution

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Similar questions

100 g

263 K

283 K

C_{i c e} = 0.49 c a l / (g^{o} C)

C_{w a t e r} = 1.00 c a l / (g^{o} C)

Δ H_{f u s} = 79.8 c a l / g

Δ H_{v a p} = 540 c a l / g

5 g

- 20^{o} C t o 35^{o} C

(S_{i c e} = 0.5 c a l / g, L_{f} = 80 c a l / g, S_{w a t e r} = 1 c a l / g)

100^{o} C

(L_{s t e a m} = 540 c a l / g, L_{i c e} = 80 c a l / g; S_{w a t e r} = 1 c a l / g^{o} C)

10 g

0^{o} C

100^{o} C

H_{2} O

80 c a l / g

540 c a l / g

1 c a l / g

150 g

100 g

80^{o} C

80 c a l / g

1 c a l / g^{o} C

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