1. The explosion of Chinese gunpowder can be represented by the following equation:
4 KNO3(s) + 7 C(s) + S(s) ----> K2CO3(s) + K2S(s) + 3 CO(g) +3 CO2(g) + 2 N2(g)
a. At STP, how many litres of N2 will be produced along with every 2.0 moles of CO2 ?
b. Find the volume of CO formed at 50 C and 101.3 kPa when 3.5 moles of carbon react.
R = 8.31 L kPa/(mole K)
3 C2H6O(g) + 4 H2CrO4 + 12 HCl ---> 3 C2H4O2 + 4 CrCl3 + 13 H2O(l)
At STP, 4 ml of C2H6O vapour are bubbled into a solution of chromic and hydrochloric acids. How many grams of water will be formed if all the C2H6O reacts?
3. Give a detailed account of what occurs at the molecular level when a solid sublimates.
4. Do all molecules at the same temperature have the same speed? Explain.
5. A student would like to heat a sample of hydrogen gas from 300K to 350K. By what factor will he increase the pressure of the gas if he makes sure that the volume remains constant ?
6. 0.8016 g of an element are vapourized(turns into a gas) in a 300 mL flask. The pressure gauge reads 101.3 kPa when the gas' temperature is the same as that of the 45.0 C water bath.
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