10 20 30 40 50 0 10 20 30 40 50
Volume of NaOH / cm3 Volume of NaOH / cm3
*P76895A0828*
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(c) Some information about acids in aqueous solution is given.
Comment on these pH values. No calculations are required.
(4)
pH of a solution of
Name of acid Formula of acid
This question is about ionic compounds.
(a) Draw dot-and-cross diagrams of the ions in magnesium hydroxide, showing the
outer shell electrons only.
Use × for magnesium electrons, ● for oxygen electrons and for each
hydrogen electron.
(2)
(b) Which definition correctly describes the enthalpy change of solution, Δ H ?
sol
(1)
Enthalpy change of solution, Δ H
sol
The enthalpy change when 1 mol of gaseous ions dissolves in
A
sufficient water to give an infinitely dilute solution.
The enthalpy change when 1 mol of an ionic substance dissolves in
B
water to give an infinitely dilute solution.
The enthalpy change when 1 mol of gaseous ions dissolves in
C
sufficient water to give a solution of concentration 1 mol dm−3 .
The enthalpy change when 1 mol of an ionic substance dissolves in
D
water to give a solution of concentration 1 mol dm−3 .
*P76895A02028*
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(c) The table shows the information needed to calculate the
standard enthalpy change of formation of magnesium fluoride.
Label Description Value / kJ mol−1
A enthalpy change of formation of magnesium fluoride
B lattice energy of magnesium fluoride −2957
C enthalpy change of atomisation of magnesium +148
D 1st ionisation energy of magnesium +738
E 2nd ionisation energy of magnesium +1451
F enthalpy change of atomisation of fluorine +79
G 1st electron affinity of fluorine −328
Question
Mathematics
Edexcel2024
2
(ii) Calculate the value of Δ H [MgF (s)].
f 2
(1)
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(iii) The experimental and theoretical values of the lattice energy for MgF and
Question
Physics
Edexcel2024
Planck constant h = 6.63 × 10−34 J s
Proton mass m = 1.67 × 10−27 kg
p
Speed of light in a vacuum c = 3.00 × 108 m s−1
Stefan-Boltzmann constant σ = 5.67 × 10−8 W m−2 K−4
Unified atomic mass unit u = 1.66 × 10−27 kg
Mechanics Work, energy and power
Kinematic equations of motion ΔW = FΔs
(u + v)t
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GM
gravitational potential ϕ = –
r
GMm
gravitational potential energy E = –
P r
Nm
pressure of an ideal gas p = 1 〈c2〉
Question
Physics
CAIE2024
Qq
electrical potential energy E =
P 4rf r
Question
Physics
CAIE2024
0 × 1014 Hz and 11 × 1014 Hz.
On Fig. 8.1, sketch the variation with f of the maximum kinetic energy E of the emitted
MAX
electrons. Use the space below for any working that you need.
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(b) The mass of the sphere is 0.15 kg.
(i) State the amplitude of the oscillations.
amplitude = ...................................................... m [1]
(ii) Determine the angular frequency of the oscillations.
angular frequency = .............................................. rad s–1 [2]
(iii) Calculate the total energy of the oscillations.
total energy = ....................................................... J [2]
(c) On Fig. 5.3, sketch the variation with x of the kinetic energy E of the sphere.
K
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GM
gravitational potential ϕ = –
r
GMm
gravitational potential energy E = –
P r
Nm
pressure of an ideal gas p = 1 〈c2〉
0 × 1014 Hz and 11 × 1014 Hz.
On Fig. 8.1, sketch the variation with f of the maximum kinetic energy E of the emitted
MAX
electrons. Use the space below for any working that you need.
Question
Physics
Edexcel2024
A toy car moves up a slope at a constant speed, as shown. The car is moved by a motor
with a power output of 5.2 W. The car gains a gravitational potential energy of 0.40 J in
a time of 1.1 s.
Which of the following expressions gives the work done, in J, against resistive forces?
A 5.2 − (0.40 × 1.1)
B (5.2 × 1.1) − 0.40
C (5.2 ÷ 1.1) + 0.40
D (5.2 × 1.1) + 0.40
(Total for Question 3 = 1 mark)
*P74468A0224*
(i) In a textbook, it states that an alpha particle with this energy would be brought
to rest when it reached a distance of 5.0 × 10−14 m from the centre of the
gold nucleus (197Au).
Question
Physics
Edexcel2024
P =
t
v2 = u2 + 2as W
P =
t
Forces
useful energy output
efficiency =
∑F = ma
total energy input
F
g = useful power output
m efficiency =
total power input
W = mg
moment of force = Fx
Momentum
p = mv
Question
Physics
Edexcel2024
sin C =
ΔF = kΔ x n
Young modulus
Photon model
F
Stress σ = E = h f
A
Δ x Einstein’s photoelectric equation
Strain ε =
x 1
hf = ϕ + mv2
σ 2 max
E =
ε
de Broglie wavelength
Elastic strain energy
h
Question
Physics
Edexcel2024
Kinetic energy of a non-relativistic
particle 1 Q 2
W =
Question
Physics
Edexcel2024
T = 2π
k
Nuclear radiation l
T = 2π
g
Mass-energy
ΔE = c2Δm
END OF DATA, FORMULAE AND RELATIONSHIPS LIST
Question
Physics
Edexcel2024
P74468A
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PMT
Further mechanics Energy stored in a capacitor
P74468A 3
*P69442A02732*
Turn over
Turn over
PMT
Electric circuits Waves and particle nature of light
Potential difference Wave speed
W
v = f λ
V =
Q
Speed of a transverse wave on a string
Resistance
T
V v =
R = μ
I
Intensity of radiation
Electrical power and energy
P
P = VI I =
A
P = I 2R
Power of a lens
V 2
P = 1
R P =
f
W = VIt
P = P + P + P + …
Over one hundred years ago, Rutherford supervised a series of experiments using a
source of alpha particles and thin gold foil.
(a) Describe the model of the atom that Rutherford proposed as a result of this series
of experiments.
(3)
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(b) The initial kinetic energy of an alpha (4α) particle is 7.3 × 10−13 J.
Question
Physics
CAIE2024
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GM
gravitational potential ϕ = –
r
GMm
gravitational potential energy E = –
P r
Nm
pressure of an ideal gas p = 1 〈c2〉