14.2 Specific heat capacity and latent heat

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Question 43

A student heats a liquid at its boiling point. The table shows two experiments. The rate of energy loss to the surroundings is the same in both experiments.

Heater power in $W\mathrm{W}$	Mass evaporated in $kg\mathrm{kg}$	Time in $s\mathrm{s}$
40	0.0060	300
70	0.0120	300

What is the specific latent heat of vaporisation? Use $E = P t$ and $E = m L$ .

[1]

$J/kg1.75\times10^6\ \mathrm{J/kg}$

$J/kg5.0\times10^5\ \mathrm{J/kg}$

$J/kg1.5\times10^6\ \mathrm{J/kg}$

$J/kg2.0\times10^6\ \mathrm{J/kg}$

A student heats a liquid at its boiling point. The table shows two experiments. The rate of energy loss to the surroundings is the same in both experiments.

Heater power in $W\mathrm{W}$	Mass evaporated in $kg\mathrm{kg}$	Time in $s\mathrm{s}$
40	0.0060	300
70	0.0120	300

What is the specific latent heat of vaporisation? Use $E = P t$ and $E = m L$ .

$J/kg1.75\times10^6\ \mathrm{J/kg}$

$J/kg5.0\times10^5\ \mathrm{J/kg}$

$J/kg1.5\times10^6\ \mathrm{J/kg}$

$J/kg2.0\times10^6\ \mathrm{J/kg}$

14.2 Specific heat capacity and latent heat

Question 43

Markscheme

14.2 Specific heat capacity and latent heat

Question 43

Markscheme

14.2 Specific heat capacity and latent heat

Question 43

14.2 Specific heat capacity and latent heat Questions

14.2 Specific heat capacity and latent heat

Question 43

14.2 Specific heat capacity and latent heat Questions