Heat-Exchanger Arithmetic: Mass Flow and Temperature Change

Heat-Exchanger Arithmetic: Mass Flow and Temperature Change

Original quantitative learning practice in English. All 24 questions are included. Four supplied cases exercise six related calculation targets; they form one topic, not four separate tests. Every question includes the complete initial data. Use the stated model and retain intermediate precision. Choose one answer. Learning target: 20/24, not an official pass mark. This bank covers the calculation topic in its title; it is not a complete professional examination, design approval or operating instruction.
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A model liquid flows at 0.6 kg/s with supplied constant specific heat 4 kJ/(kg·K). It warms from 22 to 38 °C. Heat rate in kW equals mass flow×specific heat×temperature rise. The process lasts 35 minutes. Ignore phase change and heat losses. Calculate the transferred energy in kWh. Keep intermediate values unrounded; round the final result to four decimal places if necessary.