Iron is heated from 100oC to 1000 oC. By how much does its chemical potential change? Take Sm=53 JK-1

In vacuum distillation, the surrounding pressure inside a chamber is lowered so the solvent boils at a lower temperature. This is useful when isolating compounds that are temperature-sensitive. To what pressure must a chamber be reduced to distill methanol (ΔvapH = 38.56 kJ/mol, TBP = 351 K) at 25.0°C?

At 25 °C, the equilibrium partial pressures for the reaction 2 A(g) + 4B(g) = 2C(g) + D(g) were found to be P = 4.62 bar, P = 4.70 bar, Pe=5.81 bar, and Pp = 5.90 bar. What is the standard change in Gibbs free energy of this reaction at 25 C? AG kJ/mol

What is the balanced equation with phases for the decomposition of lithium bicarbonate into lithium carbonate, water, and carbon dioxide? Also, the combustion of ethanol, C2H6O? Also, the single-replacement reaction between aluminum metal and sulfuric acid?

Use the following data to determine the AH° for the conversion of diamond into graphite: C(s,diamond) +O2(g) CO,(g) AH°= -395.4 kJ 200,(g) 2c0(g) +0,(g) AH°= 566.0 kJ 2c0(g) C(s,graphite) + CO,(g) AH°= -172.5 kJ C(s,diamond) AH° = → C(s,graphite) kJ

A geochemist in the field takes a 9.0 mL sample of water from a rock pool lined with crystals of a certain mineral compound X. He notes the temperature of the pool, 15. C, and caps the sample carefully. Back in the lab, the geochemist first dilutes the sample with distilled water to 400. mL.. Then he filters and evaporates all the water under vacuum. Crystals of X are left behind. The researcher washes, dries and weighs the crystals. They weigh 0.045 g. Using only the information above, can you calculate the solubility of Xin water at 15.° C7 If you said yes, calculate it. Be sure your answer has a unit symbol and 2 significant digits. yes O no 0 0.9 H ロ･ロ X 0 G

Element X has an enthalpy of fusion of 59.2 kJ mol-1 at its melting point (684°C). Calculate ΔSsys for the process,X(l) → X(s)At 1 bar and 684°C. Express your answer in units of J mol-1 K-1 to 3 significant figures.

The standard enthalpy of formation of gaseous H₂0 at 298 K is -241.82 kJmol-¹. Estimate its value at 100 °C. Cp,H₂0 = 33.58 Jmol¯¹K−¹ Cp,H, = 28.84 Jmol-¹K-1 Cp,0₂ = 29.37 Jmol-¹K-¹