Review Science 10

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Endo vs Exo heat management ,rates of chemical reaction

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cynthia emper balisto

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Review Science 10


Froggy Jumps Review Science 10Versión en línea Endo vs Exo heat management ,rates of chemical reaction por cynthia emper balisto 1 Which term describes a reaction that absorbs heat from the surroundings? a Isothermal b Exothermic c Endothermic 2 Which condition will generally slow an exothermic reaction? a Increasing reactant concentration b Lowering the temperature c Raising the temperature 3 What happens to the surroundings if an exothermic reaction releases heat? a Surroundings warm up b No heat change in surroundings c Surroundings cool down 4 To control the rate of an endothermic reaction, which action is effective? a Cool the system b Increase temperature c Remove reactants 5 Which method reduces heat release from an exothermic reaction in a batch process? a Cooling the reaction mixture b Adding heat c Increasing pressure 6 What is the catalyst found in our guts that helps in digestion? a Saliva b Stomach c Enzymes 7 What effect does increasing pressure have on a reaction producing a gas? a Depends on gas moles; can shift toward fewer moles b Has no effect on equilibrium c Always speeds up 8 Which factor does NOT directly affect the enthalpy change (ΔH) of a reaction? a Temperature b Pressure (for gases at constant volume) c Catalyst 9 A reaction vessel with good insulation is typically used to: a Increase rate of heat transfer b Minimize heat exchange with surroundings c Maximize heat loss 10 Which statement is true about endothermic and exothermic processes? a Both absorb heat and release equally b Both release heat c Endothermic absorbs heat; exothermic releases heat 11 Which factor raises the rate by increasing particle collisions when concentration rises? a Larger particle size with no surface area change b Lower temperature c Higher reactant concentration 12 How does increasing temperature generally affect reaction rate? a Has no effect on rate b Increases rate c Decreases rate 13 What effect does increasing surface area have on reaction rate? a Slower rate b Faster rate c No change in rate 14 Which role does a catalyst play in a reaction? a Speeds up the reaction b Slows down the reaction c Is consumed entirely without effect 15 What is the effect of stirring (agitation) on reaction rate in a solution? a Decreases rate b Has no effect c Increases rate 16 Which factor involving gas-phase reactions involves changing pressure? a Solvent polarity b Catalyst c Pressure 17 Which statement about solvents is true for reaction rate? a Solvent always slows reactions b Solvent has no effect on rate c Solvent can affect collision frequency 18 What other factor can improve reaction rate by providing alternative reaction pathways? a Catalyst b Increased solvent viscosity c Inert gas addition 19 Which factor relates to the nature of reactants affecting collision energy? a Activation volume b Activation energy c Equilibrium constant 20 Which factor involves light providing energy to promote a reaction? a Photochemical activation b Inert atmosphere c Thermal insulation

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Review Science 10

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Review Science 10Versión en línea

por cynthia emper balisto

Which term describes a reaction that absorbs heat from the surroundings?

Which condition will generally slow an exothermic reaction?

What happens to the surroundings if an exothermic reaction releases heat?

To control the rate of an endothermic reaction, which action is effective?

Which method reduces heat release from an exothermic reaction in a batch process?

What is the catalyst found in our guts that helps in digestion?

What effect does increasing pressure have on a reaction producing a gas?

Which factor does NOT directly affect the enthalpy change (ΔH) of a reaction?

A reaction vessel with good insulation is typically used to:

Which statement is true about endothermic and exothermic processes?

Which factor raises the rate by increasing particle collisions when concentration rises?

How does increasing temperature generally affect reaction rate?

What effect does increasing surface area have on reaction rate?

Which role does a catalyst play in a reaction?

What is the effect of stirring (agitation) on reaction rate in a solution?

Which factor involving gas-phase reactions involves changing pressure?

Which statement about solvents is true for reaction rate?

What other factor can improve reaction rate by providing alternative reaction pathways?

Which factor relates to the nature of reactants affecting collision energy?

Which factor involves light providing energy to promote a reaction?