Describes the compound spontaneously decomposes

Reference no: EM13496574

A sample consisting of 22.7g of a nongaseous, unstable compound X is placed inside a metal cylinder with a radius of 8.00 cm, and a piston is carefully placed on the surface of the compound so that, for all practical purposes, the distance between the bottom of the cylinder and the piston is zero. The piston-and-cylinder apparatus is carefully placed in 10.00 kg of water at 25.00 degrees celsius. The barometric pressure is 778 torr.

When the compound spontaneously decomposes, the piston moves up, the temperature of the water reaches a maximum of 29.52 C, and then it gradually decreases as the water loses heat to the surrounding air. The distance between the piston and the bottom of the cylinder, at the maximum temperature, is 59.8 cm. Chemical analysis shows that the cylinder contains 0.300 mol Carbon dioxide, 0.250 mol liquid water, and 0.025 mol oxygen gas, and an __ of A

It is known that the enthalpy change for the decomposition of X, according to the reaction described above, is -1893 kJ/mol X. The standard enthalpies of formation of gaseous carbon dioxide and liquid water are -393.5 kj/mol and -386 kj/mol respectively. The heat cacpacity for water is 4.184 J/Cg. The conversion factor between L atm and J R, namely 0.08206 Latm/molK and 8.3145 J/mol K. the vapor pressure of water at 29.5 C is 31 torr. Assume that the heat capacity of the piston-and-cylinder apparatus is negligible and that the piston has negligible mass.

Given the preceding information, determine
a. Find formula for X.
b. The pressure-volume work (n kJ) for the decomposition of 22.7-g sample of X.
c. The molar change in internal energy for the decomposition of X and the approximate standard enthalpy of formation of X.

Reference no: EM13496574

Questions Cloud

Explain the i3- ion was then titrated with thiosulfate : A 2.50 g sample of a bronze gong was cut out and dissolved in suklfuric acid. The copper sulfate produced was mixed with KI to form CuI and the triiodide ion, I3-. The I3- ion was then titrated with thiosulfate, S2O3 2-.

Explain hydrobromic acid + aluminum hydroxide : hydrobromic acid + Aluminum hydroxide -> water + aluminum bromide was double displacement but i got it wrong. What type of reaction is this?

Evaluate the volume of 12.9 molar ethanol solution : calculate the volume of 12.9 molar ethanol solution needed to prepare 2 L of 8.12 molar ethanol solution. (i did this by doing MV=MV and got 1.26 L)

Identify transactions related to governmental entities : Understand accounting and reporting requirements for governmental entities and identify specific transactions related to governmental entities

Describes the compound spontaneously decomposes : When the compound spontaneously decomposes, the piston moves up, the temperature of the water reaches a maximum of 29.52 C, and then it gradually decreases as the water loses heat to the surrounding air.

Explain the final temperature in the box at thermal : These compartments are connected by a partition that transmits heat. What is the final temperature in the box at thermal equilibrium

Define the molar heat capacity of liquid water : How much heat is released when 105g of steam at 100.0 degrees celsius is cooled to ice at -15.0 degrees celsius? The enthalpy of vap of water is 40.67kJ/mol, the enthalpy of fusion for water is 6.01kJ/mol, the molar heat capacity of liquid water

Compute the capacitance of the capacitor : A series combination of a 8 kΩ resistor and an unknown capacitor is connected to a 13 V battery. Determine the capacitance of the capacitor

Compute the mean diameter of a blood cell in centimeters : The formula for the volume of a sphere is V=4(3.167)r^3/3. Assuming a spherical shape, calculate the mean diameter of a blood cell in centimeters.

User Account

All Pages