One mole of an ideal monatomic gas (CV = 32 R) is at 400 K and 10.0 bar in a cylinder with insulated walls. The external pressure is suddenly dropped to 2.0 bar and held there, and the gas expands against it until its own pressure is 2.0 bar. What is the final temperature of the gas?

ChemistryHardHigh School (11–12)Chemical Thermodynamics › Systems, Work, Heat and the First Law JEE Main JEE Advanced

One mole of an ideal monatomic gas ( $C_V = \tfrac32 R$ ) is at $400\ \text{K}$ and $10.0\ \text{bar}$ in a cylinder with insulated walls. The external pressure is suddenly dropped to $2.0\ \text{bar}$ and held there, and the gas expands against it until its own pressure is $2.0\ \text{bar}$ . What is the final temperature of the gas?

← All Quizzes

← Methanol boils at 64.65 °C (337.8 K) under a pressure of 1 bar, and its enthalpy of vaporisation there is 35.3 kJ mol⁻¹. Liquid and vapour are at equilibrium at the boiling point. What is the entropy change when one mole of liquid methanol turns to vapour at its boiling point?The standard enthalpy of formation of methane, CH₄(g), is -74.8 kJ mol⁻¹. The enthalpy of atomisation of graphite, C(graphite) → C(g), is 716.7 kJ mol⁻¹, and the bond enthalpy of H₂ is 435.8 kJ mol⁻¹. What is the mean C-H bond enthalpy in methane, in kJ mol⁻¹, to the nearest integer? →

More onChemical Thermodynamics › Systems, Work, Heat and the First Law

Discussion (0)

Loading…

Discussion (0)

Problems on this topic