The thermal decomposition of K2C204 in a current of dry nitrogen according to the reaction K2C204 "* K2CO3 + CO (1) is shown to be influenced profoundly by the sample particle size and the heating rate. For finely ground samples, a lower activation energy (Ea = 255.15+ 5 kJ mo1-1) is obtained as compared with the 312.6 -4-6 kJ mo1-1 observed for crystal chips weighing 30-40 rag. The characteristic temperatures (the reaction start, peak and end temperatures) are markedly reduced by fine grinding. High heating rates tend to separate the thermal decomposition process into two kinetic phases, shown by splitting of the DTG peak. The significance of these observations is discussed, and the results are theoretically accounted for.The thcrmogravimetric decomposition of K2C204 in a current of dry nitrogen according to the reaction: K2C204 -~ K2CO3 + CO(1) was undertaken in order to explore the influence of the sample particle size and heating rate. These variables were shown to exert profound effects on the kinetics of (1). ExperimentalCrystal aggregates weighing 30-40 mg and fincly ground powders of reagent grade K2C204-H20 were used. The powders were obtained by John W'dey & Sons, Limited, Chichester Kiad6, Budapeat

No abstract

A survey is given of the development of Kiswahili written literature during the past two decades. Particular attention is given to (a) the rise of the socially critical literature, (b) the emergence of experimental forms of literature, (c) the growing popularity of ‘pop’ fiction, (d) the continued development of the nationalistic-cum-cultural novel and (e) the quantitative and qualitative growth of Kiswahili translations. All this is placed against the background of East-African cultural and political developments since Independence.

A survey is given of the development of Kiswahili written literature during the past two decades. Particular attention is given to (a) the rise of the socially critical literature, (b) the emergence of experimental forms of literature, (c) the growing popularity of pop'fiction, (d) the continued development of the nationalistic-cum- cultural novel and (e) the quantitative and qualitative growth of Kiswahili translations. All this is placed against the background of East-African cultural and political developments since Independence.KEY WORDS: Tanzania, Swahili, literature (poetry, drama, fiction), East African historical and political development

No abstract