Physics

A solid metal of mass 150 g melts at it's melting point of 800° C by providing heat at the rate of 100 W. The time taken for it to completely melt at the same temperature is 4 min. What is the specific latent heat of fusion of the metal?

Calorimetry

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Answer

Given,

m = 150 g = 0.15 kg

P = 100 W

t = 4 min = 240 s

specific latent heat of fusion of the metal = ?

Heat supplied = P x t

Substituting the values we get,

$\text{Heat supplied} = 100 \times 240 \\[0.5em] \text{Heat supplied} = 24000 J$

We know,

Q = m x L

Substituting the values we get,

$24000 = 0.15 \times \text{L} \\[0.5em] \Rightarrow \text{L} = \dfrac{24000}{0.15} \\[0.5em] \Rightarrow \text{L} = 160,000 \\[0.5em] \Rightarrow \text{L} = 1.6 \times 10^{5} \text{ J kg}^{-1}$

Hence, specific latent heat of fusion of the metal = 1.6 x 10⁵ J kg^-1

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Physics

A solid metal of mass 150 g melts at it's melting point of 800° C by providing heat at the rate of 100 W. The time taken for it to completely melt at the same temperature is 4 min. What is the specific latent heat of fusion of the metal?

Calorimetry

Answer

Related Questions

How much heat energy is released when 500 g of water at 80° C cools down to 0° C and then completely freezes? [specific heat capacity of water = 4.2 J g^-1 K^-1, specific latent heat of fusion of ice = 336 J g^-1].

A refrigerator converts 100 g of water at 20° C to ice at -10° C in 73.5 min. Calculate the average rate of heat extraction in watt. The specific heat capacity of water is 4.2 J g^-1 K^-1 , specific latent heat of ice is 336 J g^-1 and the specific heat capacity of ice is 2.1 J g^-1 K^-1.

In an experiment, 17 g of ice is used to bring down the temperature of 40 g of water at 34° C to it's freezing temperature. The specific heat capacity of water is 4.2 J g^-1 K^-1. Calculate the specific latent heat of ice. State one important assumption made in the above calculation.

Physics

A solid metal of mass 150 g melts at it's melting point of 800° C by providing heat at the rate of 100 W. The time taken for it to completely melt at the same temperature is 4 min. What is the specific latent heat of fusion of the metal?

Calorimetry

Answer

Related Questions

How much heat energy is released when 500 g of water at 80° C cools down to 0° C and then completely freezes? [specific heat capacity of water = 4.2 J g-1 K-1, specific latent heat of fusion of ice = 336 J g-1].

A refrigerator converts 100 g of water at 20° C to ice at -10° C in 73.5 min. Calculate the average rate of heat extraction in watt. The specific heat capacity of water is 4.2 J g-1 K-1 , specific latent heat of ice is 336 J g-1 and the specific heat capacity of ice is 2.1 J g-1 K-1.

In an experiment, 17 g of ice is used to bring down the temperature of 40 g of water at 34° C to it's freezing temperature. The specific heat capacity of water is 4.2 J g-1 K-1. Calculate the specific latent heat of ice. State one important assumption made in the above calculation.

How much heat energy is released when 500 g of water at 80° C cools down to 0° C and then completely freezes? [specific heat capacity of water = 4.2 J g^-1 K^-1, specific latent heat of fusion of ice = 336 J g^-1].

A refrigerator converts 100 g of water at 20° C to ice at -10° C in 73.5 min. Calculate the average rate of heat extraction in watt. The specific heat capacity of water is 4.2 J g^-1 K^-1 , specific latent heat of ice is 336 J g^-1 and the specific heat capacity of ice is 2.1 J g^-1 K^-1.

In an experiment, 17 g of ice is used to bring down the temperature of 40 g of water at 34° C to it's freezing temperature. The specific heat capacity of water is 4.2 J g^-1 K^-1. Calculate the specific latent heat of ice. State one important assumption made in the above calculation.