A calorimeter of water equivalent 15 g contains 165 g of water at 25°C. Steam at 100°C is passed through the water for some time. The temperature is…
A calorimeter of water equivalent 15 g contains 165 g of water at 25°C. Steam at 100°C is passed through the water for some time. The temperature is increased to 30°C and the mass of the calorimeter and its contents is increased by 1.5 g. Calculate the specific latent heat of vaporization of water. [Specific heat capacity of water = 4.2 Jg⁻¹K⁻¹]
Energy sources: fossil fuels (petroleum, natural gas, coal – non-renewable), hydroelectric (dams), solar, wind, biomass (wood, agricultural waste). Nigeria has abundant petroleum and gas; solar potential underutilized.
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Energy challenges: inadequate generation, poor transmission and distribution, vandalism, management failures. Energy access is crucial for development. Renewable energy offers alternatives but requires investment.
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