Chemistry

Chemistry, 29.07.2019 18:00, slpsoniaa

Calculate the heat required to convert 10g of water at 100 c to steam at 100 c the specific heat of water is 1.00 cal the heat of fusion is 80 and the heat of vap is 540

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Physics, 22.07.2019 11:30, mm016281

How much energy is required to change a 40 g ice cube from ice at −14◦c to steam at 118◦c? the specific heat of ice is 2090 j/kg · ◦ c, the specific heat of water is 4186 j/kg · ◦ c, the specific heat of stream is 2010 j/kg · ◦ c, the heat of fusion is 3.33 × 105 j/kg, and the heat of vaporization is 2.26 × 106 j/kg. answer in units of j?

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Chemistry, 26.10.2019 20:43, jholbrook7643

20 points for 2 chemistry questions! 1.) consider the specific heats. h2o(s) = 2.09 j/g · ◦c h2o (ℓ) = 4.18 j/g · ◦c h2o(g) = 2.03 j/g · ◦c. the heat of fusion for water is 334 j/g and its heat of vaporization is 2260 j/g. calculate the amount of heat required to convert 90 g of ice at −15◦c completely to liquid water at 56◦c. answer in units of kj. 2.) how much energy is required to turn 12 g ice at 227 k into steam at 382 k? specific heat of ice = 2.077 j/g·k specific heat of water (ℓ) = 4.180 j/g·k specific heat of steam = 2.042 j/g·k h2o heat of fusion = 6.00 kj/mol h2o heat of vaporization = 40.6 kj/mol answer in units of j.

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Physics, 30.10.2019 09:31, TheMixingToad

Aman would like to study the heat transfer between ice, water and steam. if there is 2kg of ice at -18c, 10kg of water at 25c and 1kg steam at 100c. assume there is no heat loss to the surrounding. specific latent heat of fusion for water lf = 3.34 × 105 j kg-1, specific latent heat of vaporization for water lv = 2.26 × 106 j kg-1, specific heat capacity of ice is 2100 jkg–1k–1, specific heat capacity for water c = 4200 j kg-1 c-1. (a) a minimal portion of water is added to melt all the ice. how many kg of water is required? (b) a minimal portion of steam is added to melt all the ice. how many kg of steam is required? (c) what is the final temperature (c) when all the ice and water mix with each other? (3 marks) (d) what is the final temperature (c) when all the ice and steam mix with each other? (2 marks)

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