Question Bank • QB_DFE_EXP_075 NAT • 2 Marks

Section 7: Dairy and Food Engineering

Preservation of Food

Subtopic: Preservation of food by cooling and freezing

Question Statement:

A batch of $200\text{ kg}$ of fresh strawberries at $20^\circ\text{C}$ is precooled to $2^\circ\text{C}$. The average specific heat of strawberries above freezing is $3.89\text{ kJ/(kg}\cdot\text{K)}$. Calculate the sensible heat removed in $\text{kJ}$.

Answer Key:

14004

Step-by-Step Solution & Explanation

$Q = m \times c_p \times \Delta T = 200\text{ kg} \times 3.89\text{ kJ/(kg}\cdot\text{K)} \times (20 - 2)\text{ K} = 200 \times 3.89 \times 18 = 14004\text{ kJ}$
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