The standard reaction enthalpy for the decomposition of CaCl2 · NH3(s) into CaCl2(s) and NH3(g) is nearly constant at +78 kJ mol−1 between 350.K and 470.K. The equilibrium pressure of NH3 in the presence of CaCl2 · NH3 is 1.71 kP a at 400.K. Find an expression for the temperature dependence of ∆rG◦ m in the same range.

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

When at a point two solid phase changes to one solid phase on cooling then it is known as a) eutectoid point b) eutectic point c) peritectic point d) peritectoid point

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.