# Question

Write reactions that correspond to the following enthalpy changes:

a. ΔHof for solid aluminum oxide

b. the standard enthalpy of combustion of liquid ethanol [C2H5OH(l)]

a. ΔHof for solid aluminum oxide

b. the standard enthalpy of combustion of liquid ethanol [C2H5OH(l)]

## Answer to relevant Questions

The heat required to raise the temperature from 300.0 K to 400.0 K for 1 mole of a gas at constant volume is 2079 J. The internal energy required to heat the same gas at constant pressure from 550.0 K to 600.0 K is 1305 J. ...The best solar panels currently available are about 15% efficient in converting sunlight to electricity. A typical home will use about 40 kWh of electricity per day (1 kWh = 1 kilowatt hour; 1 kW = 1000 J/ s). Assuming 8.0 ...Choose the substance with the larger positional probability in each case. a. 1 mole of H2 (at STP) or 1 mole of H2 (at 100oC, 0.5 atm) b. 1 mole of N2 (at STP) or 1 mole of N2 (at 100 K, 2.0 atm) c. 1 mole of H2O(s) (at 0oC) ...A cylinder with an initial volume of 10.0 L is fitted with a frictionless piston and is filled with 1.00 mole of an ideal gas at 25oC. Assume that the surroundings are large enough so that if heat is withdrawn from or added ...What determines ΔSsurr for a process? To calculate ΔSsurr at constant pressure and temperature, we use the following equation: ΔSsurr = 2ΔH/ T. Why does a minus sign appear in the equation, and why is ΔSsurr inversely ...Post your question

0