B, C : correct
During melting ,heat is absorbed from surrounding. Solid becomes liquid. So, randomness of the system increases. Hence, dS of system becomes +ve
Since, heat is released by surrounding which gets absorbed by the system. Hence, entropy of system increases while that of surrounding decreases. Hence, both are equal in magnitude but opposite in sign.
The melting point of gallium is 29.76 °C at 1 atmosphere pressure because under these conditions...
Gallium has a melting point of 29.8oC and an enthalpy of fusion of 5.59 kJ/mol. Calculate the change in entropy of the system, surroundings, and universe to show that the following process is spontaneous if 10.0 grams of liquid gallium is left in a 20.0oC room.Ga (l, 29.8oC) --> Ga (s, 29.8oC)
The element gallium (Ga) freezes at 29.8 C, and its molar enthalpy of fusion is ?Hfus= 5.59kJ/mol . 1. When molten gallium solidifies to Ga(s) at its normal melting point, is ?S positive or negative? 2. Calculate the value of ?S when 70.0g of Ga(l) solidifies at 29.8�C. ?S= ?
Gallium metal melts at 29.8°C. At the melting point the density of the solid is 5-90 g/ml, and that of the liquid is 6.10 g ml. a Does solid gallium expand or contract when it is melted? contracts Explain The same amount of mass occupies space in the liquid phase than in the solid phase. 6. What is the change in volume when 6.10 mL (cm) of solid gallium is melted? Volume by mi Reference Lt 30.0°C.Calculate the change in...
The melting point of benzene C,H, is 5.50 °C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in benzene is TNT (trinitrotoluene). How many grams of TNT, C,H,1,0, (227.1 g/mol), must be dissolved in 245.0 grams of benzene to reduce the melting point by 0.350 "C? g TNT
The melting point of water H2O is 0.00 °C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in water is antifreeze (ethylene glycol) . How many grams of antifreeze , CH2OHCH2OH ( 62.10 g/mol), must be dissolved in 289.0 grams of water to reduce the melting point by 0.350 °C ?
3.-12.22 points SerCP11 1 XP026 If B is added to A, under what conditions does the resultant vector have a magnitude equal to A + B? O A and B are perpendicular. - A and B are in the opposite direction. A and B are in the same direction. Under what conditions is the resultant vector equal to zero? A and B are equal in magnitude and perpendicula. A and B are equal in magnitude and opposite in direction O...
Question 1 (1 point) Balance the following reaction which occurs under acidic conditions. What is the balanced reaction? Ag (s) + NO3(aq) -- Ag+ (aq) + NO (g) O Ag (s) + 4 NO3- (aq) +8H* -- Ag+ (aq) + 4 NO(g) + 4 H20 (1) 3 Ag (s) + NO3- (aq) + 4H+ (aq)- 3 Ag+ (aq) + NO (g) + 2 H20 O Ag (s) + NO3(aq) + 4H+ -- Ag+ (aq) + NO (g) + 2 H20...
At 1 atm butyric acid, C4H8O2, has a boiling point of 163.5°C and a melting point of -7.9°C. Predict the signs of AG, AH, AS and w for the process: C4H802 (1) ► C4H8O2 (g) at 147 °C - VAG + VAH + ✓ AS Submit Answer Incorrect. Tries 1/2 Previous Tries
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Question 12 (1 point) Which diagram best describes an aqueous son of copper chord Water molecules are omitted for clarity O- FA 09 o Figure Figure D 8098 0.000 Figure E Question 11 (1 point) Which atom is the largest? O carbon O phosphorus silicon nitrogen Question 10 (1 point) For the process O2(g) → 20(g), AH° = 498 kJ.mol-1. What would be the predicted sign of AS rxn and the conditions under which this reaction...
Calculate the free energy AG at 25°C for the nonstandard conditions at point where the reaction quotient Q is 2.75 x 10 Express your answer numerically in kilojoules. View Available Hint(s) % ALC O ? AG - CO Nitrosyl chloride formation Chlorine gas. Cl(s), reacts with nitric oxide, NO(), to form nitrosyl chloride, NOCI(g), via the reaction Cl(s) + 2NO(g) + 2NOCI() The thermodynamic data for the reactants and products in the reaction are given in the following table: Substance...