Question

HELP FAST 100 PTS Calculate the amount of heat needed to lower the temperature of 50.0g of ice from -40 °C to -100 °C.

Answer 1

`\Large \boxed{\sf -6000 \ J}`

Step-by-step explanation:

Use formula

`\displaystyle \sf Heat \ (J)=mass \ (kg) * specific \ heat \ capacity \ (Jkg^(-1)\°C^(-1)) * change \ in \ temperature \ (\°C)`

Specific heat capacity of ice is 2,000 J/(kg °C)

Substitute the values in formula and evaluate

`\displaystyle \sf Heat \ (J)=0.05 \ kg * 2000 \ Jkg^(-1)\°C^(-1) * (-100\°C-(-40 \°C))`

`Q=0.05 * 2000 * (-100-(-40)) =-6000`

Answer 2

It would be -20 I think not sure