Chemistry Past Questions and Answers

1.1 g of CaCI2 dissolved in 50 cm3 of water caused a rise in temperature of3.4°C. The heat of reaction, ∆H for CaCI2 in kj per mole is?<br/>(Ca = 40, CI = 35.5, specific heat of water is 4.18 jk-1

NO<sub style='font-size: smaller;'>(g)</sub> + CO<sub style='font-size: smaller;'>(g)</sub> ↔ (1)/(2)N<sub style='font-size: smaller;'>2(g)</sub> + CO<sub style='font-size: smaller;'>2(g)</sub> ∆H = -89.3 kj. <br/>What conditions would favour maximum conversion of nitrogen (II) oxide and carbon (II) oxide in the reaction above?

Which of the following equilibria is unaffected by a pressure change?

Which of the following gases will rekindle a brightly glowing splint?

Which of the following salts can be melted without decomposition?