How much energy (in MJ) is needed to raise the temperature of 0.234 m3 of water from 15.1˚C to 76.2˚C [round your final answer to one decimal place]? {specific heat of water = 4,180 J/(kg∙˚C); density of water = 990.1 Kg/m3}
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How much energy (in MJ) is needed to raise the temperature of 0.234 m3 of water from 15.1˚C to 76.2˚C [round your final answer to one decimal place]?
{specific heat of water = 4,180 J/(kg∙˚C); density of water = 990.1 Kg/m3}
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- You mix mI = 1.2 kg of ice at TI = -19°C with mW = 3.4 kg of water at TW = 86°C in an insulated container. The specific heats of ice and water are cI = 2.10×103 J/(kg⋅°C) and cW = 4.19×103 J/(kg⋅°C), respectively, and the latent heat of fusion for water is Lf = 3.34 × 105 J/kg. Enter an expression for the final equilibrium temperature of the mixture in terms of the defined quantities. Hints : Heat problems involving phase changes generally need to be dealt with step by step, taking into account that when there is no temperature difference, there will be no heat transfer. In the present case, the first step might be to consider whether the ice warms to 0°C before or after the water cools to 0°C.-In an isolated system all the heat lost by any components of the system is gained by the system’s other components.-Use the relation among heat, mass, specific heat, and temperature change.-First, the ice reaches 0°C. Then it starts melting while the warmer water continues cooling. Now consider…What is the magnitude of energy (in MJ) that must be removed to freeze 439 L of water with a density of 999.8 Kg/m3 that is already at 0˚C [round your final answer to one decimal place]? {latent heats of water: Lf = 33.5 × 104 J/kg, and Lv = 22.6 × 105 J/kg}A metallic plate, 15 cm by 50 cm in size, is heated from 20⁰C to 220⁰C. If the plate is made of steel (? = 11 x 10-6/⁰C), what is its change in area?
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