Question

A certain freezing point requires that the room temperature be lowered from 50°C at the rate of 2°C every hour. What
will be the room temperature 20 hours after the process begins?​

Answer 1

Answer:

Let us assume that the lowered temperature as negative,

Initial temperature = 50°C

Change in temperature per hour = -2°C

Change in temperature after 10 hours = (-2) × 20 = -40°C

∴The final room temperature after 20 hours of freezing process = 40°C + (-40°C)

= -10°C

The room temperature 20 hours after the process begins= -10°C

Step-by-step explanation:

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Answer 2

Answer:

10 degree Celsius

Step-by-step explanation:

2 degree *40=80