Calculate the change in entropy of the universe if 0.3 kg of water at 70°C is mixed with 0.2 kg of water at 15°C in a thermally insulated container. The specific heat of water is 4186 J/kg•K.
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- Consider a 50.0 g ice cube placed in a container containing 200 g of water. The water is initially at 25.0*C and the ice cube comes directly from a freezer at -15.0*C. Assume no heat is lost to the surroundings and negligible heat loss from the container. Determine the total change in entropy as a result of the mixing process.Some gas was compressed isothermally. This process was accompanied by a decrease in entropy (S=10 JK-1). Calculated the volume of the gas if it initially occupied the volume of 15.0 dm3 at 1.00 atm and 250 K. Does this violate the 2nd law of the thermodynamics stating that “the entropy of the isolated system can not decrease” ? Explain why.Find the change in entropy that results when a 3.2-kg block of ice melts slowly (reversibly) at 1 °C. Assume that Latent frequency is 3.35 x 10^5 J/Kg.
- What is the decrease in entropy of 44.8 g of water that condenses on a bathroom mirror at a temperature of 39.7°C, assuming no change in temperature and given the latent heat of vaporization to be 2450 kJ/kg? Select the correct answer O 396 J/K O 189 J/K X Your Answer O 209 J/K 351 J/K O 251 J/KA large factory furnace maintained at 170 ∘C at its outer surface is wrapped in an insulating blanket of thermal conductivity 5.50×10−2 W/(m⋅K) which is thick enough that the outer surface of the insulation is at 43.0 ∘C while heat escapes from the furnace at a steady rate of 140 W for each square meter of surface area. By how much does each square meter of the furnace change the entropy of the factory every second?How much energy must be transferred as heat for a reversible isothermal expansion of an ideal gas at 132°C if the entropy of the gas increases by 46.0 K
- A Styrofoam cup holding 118 g of hot water at 1.00 x 10-°C cools to room temperature, 21.0°C. What is the change in entropy of the room? (Neglect the specific heat of the cup and any change in temperature of the room. The specific heat of water is 4,186 J/(kg · °C).) J/KA block made of cobalt with a mass of 0.80 kg is heated to 850°C, then dropped into 5.00 kg of water at 10°C. What is the total change in entropy (in J/K) of the block-water system, assuming no energy is lost by heat from this system to the surroundings? The specific heat of cobalt is 420 J/(kg · K), and the specific heat of water is 4,186 J/(kg · K). (Hint: note that dQ = mcdT.)