When a catalyst is added to a reaction at equilibrium, what happens to the equilibrium position? A. Shifts to the right B. Shifts to the left C. No change D. Can't determine 相关知识点: 试题来源: 解析 C。解析:催化剂只能改变反应速率,不能改变平衡状态,所以平衡位置不变。
When a catalyst is added to a reaction at equilibrium, it ___ the equilibrium position. A. shifts B. changes C. does not change D. destroys 相关知识点: 试题来源: 解析 C。催化剂只能改变反应速率,不能改变平衡位置。选项 A“shifts”和选项 B“changes”都错误;选项 D“destroys”破坏也不...
23 For a reaction at equilibrium, which change can increase the rates of the forward and reverse reactions?(3)(1) a decrease in the concentration of the reactants(2) a decrease in the surface are a of the products(3)an increase in the temperature of the system(4)an increase in the ...
When a chemical reaction reaches equilibrium, the rate of the forward reaction is ___ the rate of the reverse reaction. A. greater than B. less than C. equal to D. not related to 相关知识点: 试题来源: 解析 C。在化学平衡状态下,正反应速率等于逆反应速率。选项 A“greater than”表示...
A. the rate of a chemical reaction B. the temperature of a chemical reaction C. the extent of a chemical reaction at equilibrium D. the pressure of a chemical reaction 相关知识点: 试题来源: 解析 C。解析:平衡常数 K 是衡量化学反应在平衡状态下的程度。A 选项是反应速率;B 选项是温度;D...
A. The rate of a chemical reaction. B. The amount of reactants at equilibrium. C. The extent of a chemical reaction at equilibrium. D. The pressure of a reaction. 相关知识点: 试题来源: 解析 C。解析:平衡常数 K 是衡量化学反应在平衡状态下进行程度的量。A 选项是反应速率;B 选项是平衡时...
When a chemical reaction reaches equilibrium, the rates of the forward and reverse reactions are: A. zero. B. different. C. equal. D. increasing. 相关知识点: 试题来源: 解析 C。解析:当化学反应达到平衡时,正反应和逆反应的速率相等。选项 A 速率为零错误。选项 B 不同错误。选项 D 不是在...
A. reactants B. products C. equilibrium state D. reverse reaction 相关知识点: 试题来源: 解析 B。平衡常数大说明反应更倾向于生成产物。选项 A“reactants”表示反应物;选项 B“products”表示产物;选项 C“equilibrium state”表示平衡状态;选项 D“reverse reaction”表示逆反应。所以答案是 B。反馈...
When a reversible reaction has attained equilibrium at a given temperature,the product of the molar concentrations of the substances to the right of the arrow in the equation divided by the product of the molar concentrations of the substances to the left,each concentration raised to the power ...
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