Question
10. The energy transferred to the water in 100 seconds was 155000 J. specifi hheat eapacity of weler=4200.MKg=^circ C Determine the mass of water in the kettle. Use the graph above. Give your answer to 2 significant figures. Mass of water (2 slgniffcennt figures)=
Answer
4.3
(267 Votes)
Jocelyn
Professional · Tutor for 6 years
Answer
【Explanation】: The quantity of heat (Q) transferred to or from a substance is computed by the equation Q = mcΔT, where m represents the mass of the substance, c stands for its specific heat capacity, and ΔT is the variation in temperature. Currently, we have the following values known: Q = 155000 joules (the heat supply for 100 seconds), c = 4200 joules/kg°C (the specific heat capacity of water). However, ΔT (the change of the temperature) and m (the mass of the water) are unknown. Because the question ignored the related temperature, we can't finish the formula completely so that the issue can't be resolved in this situation. The Question requires more details on the initial and final water temperatures, and if provided, we could use these to ascertain its mass using the equation above. However, given the insufficient data and the failure to mention the temperature change, I'm afraid the calculation of the mass of water can't be conducted accurately. So the "Incomplete Information" is the primary issue.