14.) A fixed mass of an ideal gas is heated from 60C to 90C at a constant volume. (a) 1m^3 and (b) 3m^3. For which case do you think will the energy be greater? a.(a) 1 m^3 since it's a smaller volume b.(b) 3 m^3 since it's a larger volume c.none of the cases d.same for both cases since Cv doesn't vary

The density of ice and water are 917 kg/m³ and 1000 kg/m³. The latent heat for the transition between ice and water is 334 kJ/kg. Calculate the slope of the tangent of the coexistence curve of ice and water at T = 213 K. Select one: dP dT a. b. C. O d. dP dT dP dT dP dT = - -170 atm/K = — - - 181 atm/K -203 Pa/K -183 Pa/K

1. An ideal diatomic gas at 63 K is slowly expanded adiabatically and reversibly to twice its original volume. What is its final temperature? Final temperature: K Think: Should the gas cool down or heat up during the adiabatic expansion? Does your answer validate your prediction.

I have got variations in answers when I have asked this question. I have got answers anywhere from 75000 J,  6079.5 J to 74919 J and -6.221kJ.   I need to know the correct answer for this I am hopelessly confused.