GOB Chemistry
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Choose the statement that best describes the rate of a reaction:
Based on the following reaction,
Ge(s) + 2 F2(g) → GeF4(g)
what is the effect on the reaction rate if three moles of Ge are removed?
Consider the following reaction:
2 SeO2(g) + O2(g) → 2 SeO3(g)
Determine the effect on the reaction rate if two moles of SeO2 are added.
Changing the concentration of the reactants will not affect the rate of reaction. Is this true or false?
Consider the following reaction: SiC (hexagonal) → SiC (cubic), ΔG = –0.598 kcal/mol (–2.50 kJ/mol) at 25°C. Explain why SiC (hexagonal) lasts for a long period of time even though the reaction is spontaneous.
Which statements explains the energy requirements of chemical reactions?
A) The rate of reaction increases with both increasing temperature and activation energy.
B) The rate of reaction increases with increasing temperature and decreasing activation energy.
C) The rate of reaction increases with decreasing temperature and increasing activation energy.
D) The rate of reaction increases with both decreasing temperature and activation energy.
A chemist is trying to observe the decomposition of H2O2 into H2 and O2. One reaction set-up involved 5.00 g H2O2 being placed in a 500-mL flask at 30 °C. Another set-up involved 5.00 g H2O2 being placed in a 1.0-L flask at 30 °C. Which explains why the second set-up would have a slower reaction?
Which statements apply to the function/s of a catalyst in a reaction?
A. The catalyst increases the activation energy of a reaction.
B. The catalyst decreases the activation energy of a reaction.
C. The catalyst has no effect on the activation energy.
D. The catalyst increases the rate constant.
E. The catalysts decreases the rate constant.
F. The catalysts has no effect on the rate constant.