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Calorimetry quiz
Preguntas del test (17)
1Is an exothermic reaction, is heat given out to the surroundings or taken in heat to the surroundings?
- Agiven out
- Btaken in
2What symbol is used to show an endothermic reaction?
- A+
- B-
3Do reactants have more or less chemical energy than products in an exothermic reaction?
- Amore
- Bless
4Enthalpy change is the heat change at a constant temperature
- AVerdadero
- BFalso
5in enthalpy changes why are standards used?
- Aso it doesnt affect the amount of energy of the reation taken which can affect the temp
- Bso it doesnt affect the amount of energy of the reation lost which can affect the temp
- Cthe standard enthaply change measured depends on the reaction not on the conditions
- Dso it doesnt affect the amount of energy of the reation created which can affect the temp
6What are calorimeters designed for?
- Ato contain reactions where all the heat produced can be exchanged with the surroundings in a measurable and accurate way
- Bto contain reactions where all the energy produced can be lost to the surroundings in a measurable and accurate way
- Cto start reactions, providing energy which can be exchanged with the surroundings in a measurable and accurate way
7What is the equation for heat produced?
- AHeat produced= mass x specific heat capacity of water x temp rise
- BHeat produced= mass x specific heat capacity of water /temp rise
- CHeat produced= mass / specific heat capacity of water x temp rise
8How do you convert J to KJ?
- A/ 1000
- Bx 1000
- C/ 10000
9what are errors in calorimetry?
- Aheat loss to the surroundings, by the apparatus, to the solid reactant
- Bthe concentration/ volume of the measurement
- Cincomplete reaction
- Dimpure reactants
- Etimings
- Finaccurate stirring
10How do you work out percentage error?
- A(difference between my value and true value/ true value) x 100
- B(difference between my value and true value/ true value) x 1000
- C( true value/ difference between my value and true value) x 100
11How do you convert q to ^_H?
- A^_= q / no. moles
- B^_= no. moles / q
- C^_= q x no.moles
12How do you convert q to ^_H?
- A^_= q / no. moles
- B^_= no. moles / q
- C^_= q x no.moles
13What is the definition of standard enthalpy change?
- Awhen 1 mole of compound is formed from its constituent elements under standard conditions with all substances in their standard states
- Bnormal states, stable under standard conditions
- Cheat change at a constant pressure
14sodium hydroxide reacts with HCL and the container becomes really quite warm- what kind of reaction is this?
- Aendothermic
- Bexothermic
15What is another name for the conservation of energy?
- AHess' Law
- BBoyle's Law
- CHeis' Law
16what kind of working out would you have to use to work out ^_H implying Hess' law
- Aenthalpy cycles
- Bmechanisms
- Cequations
17In bond enthalpies bonds broken is an exothermic reaction
- AVerdadero
- BFalso
Información
- Descripción
- AS-level (Energetics) Chemistry Test sobre Calorimetry quiz, creado por s_phie5 el 18/03/2014.
- Autor
- s_phie5
- Idioma
- English
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