Chemistry

Chemistry, 10.07.2019 06:30, victordhernandez01

What is the temperature change in 355 ml of water upon absorption of 34 kj of heat? (the specific heat capacity of water is 4.184 j/(g⋅∘

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Physics, 27.09.2019 15:00, lindalou6483

What is the temperature change in 355 ml of water upon absorption of 34 kj of heat? (the specific heat capacity of water is 4.184 j/g∘c.) express your answer in degrees celsius?

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Engineering, 03.10.2019 02:00, andres2865

Astirrer of shaft power 500w is used to stir 100 kg of water that is being heated. the heater output power is 3.5 kw and heat losses are 800w. the initial temperature of the water is 20°c. determine: (a) how long it will take before the water reaches a temperature of 80°c, (b) the internal energy change of the water. neglect the specific heat capacity of the vessel itself and take the specific heat capacity of water to be 4.19 kj/kgk.

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Physics, 23.11.2019 16:31, superfly903

1.what is true about heat capacity and specific heat? a) only heat capacity accounts for mass. b) both heat capacity and specific heat account for mass. c) neither specific heat nor heat capacity accounts for mass. d) only specific heat accounts for mass. 2. which of the following factors is not used in calculating the specific heat of a substance? a) mass b) temperature change c) heat required for a temperature change d) melting point 3. the amount of heat needed to raise 250 g of a substance by 15 k is 2,930 j. what is the specific heat of the substance ? a) 0.78 b) 11,000 c) 780 d) 1.1 × 10^7 4. if 50 g of liquid water [c = 4,180 j/(kgk)] changes temperature in a calorimeter from 298 k to 348 k, then how much heat is transferred? a) 10.5 j b) 10.5 kj c) 72.7 j d) 100 kj

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