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We drop 2.0 kg of lead with a temperature of 100 °C into a lake with a temperature of 10 °C. For how much does the entropy of the lead, lake and the universe change?
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- A 23.9 g block of copper whose temperature is 382 K is placed in an insulating box with a 57.3 g block of lead whose temperature is 228 K. (a) What is the equilibrium temperature of the two-block system? (b) What is the change in the internal energy of the two-block system between the initial state and the equilibrium state? (c) What is the change in the entropy of the two-block system? The heat capacities of copper and lead are 386 J/kg-K and 128 J/kg-K, respectively. (a) Number i (b) Number i (c) Number i Units Units UnitsA 2.00-L container has a center partition that divides it into two equal parts as shown below. The left side contains n = 0.029 0 mol of H2 gas, and the right side contains n = 0.029 0 mol of 02 gas. Both gases are at room temperature and at atmospheric pressure. The partition is removed, and the gases are allowed to mix. What is the entropy increase of the system? J/KWhich statement regarding entropy is false? A child builds a tower from a pile of blocks. The entropy of the blocks increases. A layer of salt then a layer of pepper are placed in a jar then shaken. The entropy of the salt and pepper increases. Gasoline is burned in a car engine to form exhaust. The entropy of the gasoline increases. A candle burns to heat the surrounding air. The entropy of the candle and surrounding air increases.
- The temperature at the surface of the Sun is approximately 5,600 K, and the temperature at the surface of the Earth is approximately 291 K. What entropy change of the Universe occurs when 4.50 103 J of energy is transferred by radiation from the Sun to the Earth? ____________ 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?A box contains 100 gas molecules all released on the left side of the box. What is the initial entropy of all the gas molecules on one side? You can calculate the number of microstates (left/right distribution of molecules) possible by the equation W = N! / ( nL! * nR!,) where N is the total number of molecules and nL is the number on the left and nR is the number on the right. What is the entropy of the most disorganized distribution of gas molecules?